A group of runners gathers every week to train for long-distance runs. Several students in your anatomy class are part of this group. Your classmates are curious about the physiological changes that occur with exercise. You do a little research in class and find several changes occur as exercise begins. Which of these correctly lists the changes that occur as exercise begins?
A) increased vasodilation, increased cardiac output, increased venous return
B) decreased vasodilation, decreased cardiac output, decreased venous return
C) increased vasodilation, decreased cardiac output, increased venous return
D) increased vasodilation, increased cardiac output, decreased venous return

Answers

Answer 1

Increased vasodilation, increased cardiac output, decreased venous return occurs during exercise.

Option D.

Explanation:

Exercise is a condition where the body works more than normal, leading to more consumption of nutrients and oxygen in the active muscles of body. The exercise also produces a lot of carbon dioxide in the muscles.

The increase in carbon dioxide and the need of oxygen and nutrients in the muscles lead to the para sympathetic stimulation which leads to the increase in vasodilation. This increase in vasodilation leads to reduced peripheral resistance which in turn reduces the venous return.

While, heart has sympathetic stimulation which causes the heart rate to increase and as a result cardiac output to increase too. But due to reduced venous return, the stroke volume increases up to a certain limit from where it remains still, because of the reduced blood in heart.

Answer 2

Answer:

A) increased vasolidation, increased, cardiac output, increased venous return

Explanation:

did it on usatestprep


Related Questions

Definition of cell wall

Answers

Answer:

a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants it consists mainly of cellulose.

Explanation:

Final answer:

A cell wall is an external, rigid structure found in plant, fungal, and some protist cells. Composed of varying molecules according to the type of cell, it protects the cell and maintains its shape.

Explanation:

The cell wall is a rigid structure that exists external to the plasma membrane in certain cells, particularly in plant cells, fungal cells, and some protist cells. It is primarily composed of various molecules including cellulose in plants and chitin in fungi. The cell wall serves to both protect the cell from environmental stresses like desiccation, changes in osmotic pressure, and traumatic injury and provides structural support, maintaining the shape of the cell. The composition of the cell wall can vary depending on the type of cell in question. For instance, in the case of plant cells, the cell wall is mainly composed of cellulose which is a polysaccharide comprised of glucose units. An example of how this works in everyday life would be when you bite into a raw vegetable like celery, the crunch comes from when the rigid cell walls of the celery's cells get torn by your teeth.

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What is one advantage wind power has over solar power?
A. Wind turbines harm fewer animals than solar cells.
O
B. Wind turbines are more reliable than solar cells.
O
C. Wind turbines make less noise than solar cells.
O
D. Wind turbines take up less land space than solar cells.

Answers

Answer:I think the answer is D

solor palpnles take up an whole Feild while a wind turbine would‘t take up nearly as much.

Explanation:

Wind turbines take up less land space than solar cells is one advantage wind power has over solar power.

What is wind turbines?

Wind turbines work on a simple principle: instead of using electricity to make wind—like a fan—wind turbines use wind to make electricity. Wind turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates electricity.

Wind flow patterns and speeds vary greatly across the United States and are modified by bodies of water, vegetation, and differences in terrain. Humans use this wind flow, or motion energy, for many purposes: sailing, flying a kite, and even generating electricity.

The terms "wind energy" and "wind power" both describe the process by which the wind is used to generate mechanical power or electricity. This mechanical power can be used for specific tasks (such as grinding grain or pumping water).

Therefore, Wind turbines take up less land space than solar cells is one advantage wind power has over solar power.

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PLEASE HELP I WILL GIVE BRAINLIST!
This is a bird's eye view of the location you see at the bottom of the image. It shows a topographic map of the area. Compare
the two. One feature, a
_____, is shown in the top topographic map as circles within circles.
A- canyon
B- mountain
C- plains
D- valley

Answers

A mountain is shown in the top topographic map as circles within circles (Option B).

What is a topographic map?

A topographic map is a schematic representation of a landscape by using geometric tools.

This type of map (topographic map) contains a good level of detail and represents the relief characteristics of a given region.

Topographic maps are very common in mapping and they use contour lines.

In conclusion, a mountain is shown in the top topographic map as circles within circles (Option B).

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Which best describes a protein?
A.14 bond between amino and nucleic acids

B. A chain of codons and anitcodons

C. A chain of amino acids

D . A strand of DNA

Answers

Answer:

C. A chain of amino acids

Explanation:

Proteins are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chains. There are 20 different types of amino acids that can be combined to make a protein. ... These proteins bind and carry atoms and small molecules within cells and throughout the body.

What types of materials are expelled from cells during exocytosis?
Question 8 options:

large molecules such as hormones

positive and negative ions

small molecules such as carbon dioxide

water and glycerol

Answers

Large molecules such as hormones materials are expelled from cells during exocytosis

Explanation:

The materials inside the cells are transferred to the outside of the cell and this manner is termed as  Exocytosis. This method is termed as a kind of active transport since it needs energy for this transformation process. One of the major purposes of this process is to discharge trash matters like hormones and proteins.

For a cell to cell transmission and chemical signal messaging these methods are essential. Proteins that are newly generated are transferred to the peak of the plasma membrane by exocytosis. There are three general pathways of exocytosis.

Final answer:

Materials expelled from cells during exocytosis largely consist of large molecules such as hormones, digestive enzymes, and neurotransmitters, which are integral to many bodily functions.

Explanation:

During the process of exocytosis, cells expel various materials into the extracellular space. The types of materials that are commonly released during exocytosis include large molecules such as hormones, digestive enzymes, and components of the extracellular matrix, as well as neurotransmitters. These materials are packaged into vesicles within the cell. When the vesicle membrane fuses with the plasma membrane, it releases its contents outside the cell. The identified options related to large molecules such as hormones specifically refer to the frequent export of proteins and glycoproteins that play critical roles in the body, from acting as biological messengers to facilitating digestion and immune responses.

Advances in the study of Choose
led to a classification system based on evolutionary relationships. This new system is based on
the concept of a Choose...
. which contains a single common ancestor that all species within that clade descended from.

Answers

Answer:

Advances in the study of phylogeny led to a classification system based on evolutionary relationships. This new system is based on  the concept of a clade which contains a single common ancestor that all species within that clade descended from.

Explanation:

After Darwin's evolutionary studies, the scientists looked for a way to classify organisms on the basis of phylogeny. A phylogeny depicts the relationship between organisms based on the common ancestors that they might have. A phylogeny can be shown in a diagram like a cladogram. This diagram shows branches known as clade for each particular organism that might have evolved from a particular common ancestor.

4) What is the main factor that contributes to carbons versatility?
a. It has an equal number of protons and neutrons
b. Its outer shell electrons are evenly spaced
c. It has a four electrons in its valence shell
d. It is a very large molecule

Answers

Answer:

The correct option is C)  It has a four electrons in its valence shell

Explanation:

Carbon has four electrons in its outermost shell due to which it has the ability to form single, double and even triple bonds. Carbon has the ability to form chains, branched chains and even rings due to which it is versatile in nature  and can form different types of organism compounds. Carbon is the main element in the formation of the different organic compounds due to its versatile nature. Carbon is even the element which forms many of the molecules found in space.

A type of molecule that performs important functions inside organisms

Answers

A Type of molecule that is responsible for performing important functions inside organisms is :  Lipids

What are Lipids ?

Lipids are molecules found in living orgainsms that perform the important function of building up the structure of cells in an organism and also aids in the proper functioning of the organism. Example if lipids includes :

Fats and oil Vitamins ( A, D ,E, and K ) Hormones not mad of protein

Hence we can conclude that A Type of molecule that is responsible for performing important functions inside organisms is :  Lipids

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Which statement best describes scientists who contributed to the current
body of scientific knowledge?

Answers

Answer:

As statements are not provided, let's have a look at scientific knowledge generally.

Explanation:

A piece of scientific knowledge will be considered to be true and authentic if it is supported by a number of testable experiments which gave the same supporting result again and again. Experiments performed by such scientists will be viable and will contribute to the current body of scientific knowledge.

On the other hand, scientific knowledge that is not supported by experiments that are correct will not be of much importance.

The mechanreceptors responsible for relaying sound stimuli to our ears are called (blank)?

Answers

Answer:

cochlea.

Explanation:

When a sound wave hits the eardrum, the eardrum moves tiny bones — the malleus, incus, and stapes — which subsequently move.

This movement is picked up by the mechanoreceptors in the inner ear, which exist on hair cells containing cilia between the end of the semicircular canals and the vestibule.

When the cilia move, the cells create an impulse that is sent through the cochlea to the eighth cranial nerve, which carries the impulse to the brain.

The brain then interprets the information as a specific sound.

what is the biggest bone in your body​

Answers

Answer:

Femur

Explanation:

Your femur or thigh bone is the biggest bone in your body.

Rather than pay for an oil change at the service station, Justin decides to do the job himself. He drains the used oil
and antifreeze directly into the ground in the alley beside his house. After several years, he notices there are no
more frogs in the pond behind his house. What type of pollution is demonstrated in this real world example?
Toxic
Sediment
Nutrient
Bacterial

Answers

Answer:

The answer is: Toxic Pollution

Explanation:

"Toxic pollution" refers to contaminating the surroundings with toxic or hazardous chemicals and wastes. This kind of pollution is dangerous as it causes birth defects and death of organisms.

The problem with Justin's situation above is that, he used the oil and antifreeze DIRECTLY into the ground. Antifreeze is also known as an "engine coolant." This is a toxic chemical that should not be ingested. The frogs from the pond behind his house must have ingested the engine coolant, thus resulting to their deaths. It is said that animals are attracted to its smell, thus they are more prone to ingesting or drinking it.

If you are doing it on your own without going to the service station, it is best to bring the substance to the appropriate facility that disposes it. However, in case you spill it accidentally, you may pour some soap and water so it can be mixed together, thereby reducing its toxicity.

Pls help How could the humans and high human population growth rate drive further
extinctions of plants and animals?
A. All these people need a place to live and destroy the habitat of many animals.
B. All these people can create more pollution with kill many plants and animals.
C. People continue to introduced invasive species which harm native plants and
animals.
D. All of the above.​

Answers

Answer:

D. All of the above

Explanation:

Currently, the world is facing the Sixth Mass Extinction of both wildlife and plants species, especially in regard to mammal populations. This mass extinction is the result of human activities and anthropogenic climate change as well as global warming.

Among the most harmful activities that impact wildlife populations are habitat destruction (A) like deforestation, pollution (B) such as the release of toxic chemicals that come from fertilizers and pesticides, and the introduction of exotic species into ecosystems (C) that disrupt native species' habitats and pose threats due to competition and predation.

describe how gametogenesis in egg cells is different that that of sperm cells

Answers

Answer AND Explanation:

Gametogenesis is the formation of gametes. Formation of sperms also called spermatogenesis takes place in the testes while formation of eggs also called oogenesis takes place in the ovary. Oogenesis in females begins before birth, however maturation of the eggs take a very long time and is only complete after fertilization. In males sperm formation only occurs after puberty.

A lithium atom has lost an electron comes near a chlorine atom that has gained an electron. what happens?

Answers

Answer:

Redox reaction

Explanation:

Redox reaction involves both reduction and oxidation of substances. The lithium atom is reduced as it loses the electron while chlorine is oxidised as it gains an electron. An equilibrium state is obtained and lithium chloride is formed.

Answer:

they form an ionic compound sry for the late response lol

Explanation:

How many protons is in helium

Answers

Helium is an element with an atomic number of 2 which means that it has 2 protons in its core. So if any atom has 2 protons in its core, they it's helium no matter what.

On the periodic table of elements which I have attached in the image provided, the whole numbers in the tile tell you the number of protons. So helium  is a noble gas which is found in the top right of the periodic table and I have drawn an arrow the atomic number which is the number of protons.

 

Helium has two protons in its nucleus, which define it as the element helium. The most common isotope of helium, ⁴He, has two neutrons in addition to the two protons.

The number of protons in an atom defines the identity of an element, and for helium (He), this number is two. Therefore, helium has two protons in its nucleus. Helium is also known for its isotopes.

For instance, the most common helium isotope has two neutrons along with the two protons which is represented as ⁴He, due to its mass number being 4 atomic mass units (2 amu from protons and 2 amu from neutrons).

However, there are also other helium isotopes, such as ³He, which have a different number of neutrons, but the number of protons remains the same at two. This defines the element as helium regardless of its isotope.

how does a low protein intake affect homeostasis​

Answers

Answer:

High dietary protein intakes are known to increase urinary calcium excretion and, if maintained, will result in sustained hypercalciuria. To date, the majority of calcium balance studies in humans have not detected an effect of dietary protein on intestinal calcium absorption or serum parathyroid hormone.

Explanation:

Large areas of land are being developed. In the process thousands of trees are being removed and bumes
How would this affect the cycle?

Answers

Removing trees  in large amount can cause climate change, extinction of species and hence the food cycle as well as the ecosystems

Explanation:

Deforestation is the major cause of climate change. The atmosphere gets filled with greenhouse gases which would lead to an increase in temperature. We need oxygen to live which is coming from the plants, removing would affect these cycles. several species of animals have been already extinct and continuation of this activity would end up the removal of many organisms from the food cycle and finally, we will be removed.

Newton’s Laws

A student is late for class and is running when they hit a patch of ice and begin to slide. Which of Newton’s laws is best shown here? Explain.

Answers

Answer:

Newton’s first law (i.e about inertia) is best shown in this example.

Explanation:

Newton's first law states that every object continues in its state either motion or rest until it is acted upon by any other external force.As the student is in motion when he/ she hits the patch of ice. as no external force is applied, he/she continues the motion by sliding over the ice due to inertia.Until the friction and other resistance force balances the motion he/she will not stop sliding.

A sample of vegetable oil with density 917 kg/m^3 is found to have a mass of 0.0427kg. Find the volume of the sample

Answers

Answer:

formula used: volume=density/volume

Explanation:

data:

volume=?

density(given)=917kg/m^3

mass(given)=0.0427kg

solution:

917/0.0427 =21475cm^3

Final answer:

The volume of the sample of vegetable oil is 4.66 x 10^-5 cubic meters.

Explanation:

First, we should recall the formula for density, which is:



Density = Mass/Volume



Using this formula, we can rearrange it to solve for volume:



Volume = Mass/Density



Plug in the given values:



Volume = 0.0427 kg / 917 kg/m3



Simplifying the expression, we get:



Volume = 4.66 x 10-5 m3



Therefore, the volume of the sample is 4.66 x 10-5 cubic meters.

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What kind of simple machine is the shin bone in your leg

Answers

Answer:

"Levers" kind of simple machine is the shin bone in your leg.

Explanation:

The simple machine comprised of a rigid beam or rod centralized at a fulcrum which is also considered as fixed hinge is known as "Levers". The shin forming bone is tibia attached to thigh muscles named as quadriceps, tibia is larger than two lower leg bones, also responsible for carrying the weight of body but possible from support of fibula.

The frame called as skeleton around which human body has been built. Muscles are attached to this frame and responsible for generating movement by shortening and pulling on a bone. Many levers are present in this frame itself. While the class of lever is dependent on the location of the fulcrum, load and force.

Explain how living things suck as people and trees are different from non living things such as rock and the text

Answers

Answer: because being a human sucks

Explanation:

Because humans are more liable to mess up more unlike rocks and non living things

3. Meiosis is sometimes called reduction division. What does this mean
and why is it important to a species?​

Answers

This is because meiosis reduces the total number of chromosomes to half its original number

what only acts in the digestion of carbohydrates

Answers

Answer and Explanation:

Digestion of carbohydrates occurs in the mouth, duodenum and small intestines. In the mouth, salivary amylase hydrolyses starch to maltose. In the duodenum, pancreatic amylase breaks down starch into maltose. In the small intestines, enzyme maltase digests maltose to glucose.

Which description best fits the activity of a cell during interphase?
Question 11 options:

The cell carries on metabolism.

The cell differentiates to have a new function.

The cell splits in two.

The cell splits in two but with half the normal number of chromosomes.

Answers

Answer:

The correct option is A) The cell carries on metabolism.

Explanation:

During the interphase, the cell tends to carry out its normal cell activities and it prepares itself for the cell division process during the interphase. It synthesizes proteins etc which will be required for cell division during this phase. The cell becomes enlarged during this phase. A cell tends to spend most of its time in the interphase. Hence, option A is correct.

Other options, like option C, cannot be considered to be true because the process of cell splitting does not occur during the interphase, It happens during the process of cytokinesis.

what is a negative consequence of a mandatory quarantine

Answers

Answer and Explanation:

Quarantine refers to a process in which people are isolated due to the possibility of spreading a disease. This is done to protect both the people who are in quarantine and the people that don't have the symptoms of a given disease. Mandatory quarantine refers to the legal process of people being unable to leave quarantine no matter the circumstance.

Although mandatory quarantines has many benefits as it prevents the public from being exposed to pathogens, it can have negative consequences. For example, there have been many cases in which children are left alone and isolated from parents due to the possibility of having a disease. Some professionals suggest children or parents to be able to be in quarantine at home. However, it is not as safe as other methods and mandatory quarantine is a legal procedure.

Biology Sem 1
2.1.2 Quiz: Common Elements in Living Things
Question 7 of 10
2 Points
What are the basic units of a chemical element called?
A. Solids
B. Atoms
C. Molecules
D. Gases

Answers

Atoms because everything gets built up on them

Answer:

Carbon,Hydrogen,Oxygen,Nitrogen are the most common elements in living things..96% of all living consist of It.other 3% is Calcium, Phosphorus, Potassium, Sulphur.

basic unit of chemical element is Atoms.Everything that made out of atoms called matter.When atoms combined molecules are formed.Gasses and Solids are just different state of matter.

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what do the horizontal lines mean on the following graph ?

Answers

During the horizontal line, the body was not increasing height, was vertically at rest.

Explanation:

The graph given here is a graph between the elevation and time. This graph plots movement of a body on its y axis vs time where it's seen that the body is increasing steadily in height for the first 2 minutes from when it suddenly takes a horizontal line. It means that after 2 mins, the body comes to a rest at the vertical movement. For the next 3 mins, the body remained as the same state of movement, at vertical rest. After that, the body started coming down i.e decreasing its height for the next 2 mins. Then it again started increasing its height from reference ground, untill 9 mins after which it again came at vertical rest.

EXPLAIN whether the problem of elephants destroying trees in southern Africa is due to overpopulation, competition, or both.
Will give BRAINIEST if you get it right.

Answers

both because they are vegetarian and they are reproducing more so they do have to compete for food

Final answer:

The destruction of trees by elephants in southern Africa is a complex issue influenced by elephant overpopulation, their role as ecosystem engineers, and the competition for resources. Behavioural ecology studies, including the creation of an acceptability index, offer insights into the dietary habits of elephants and the reasons behind tree damage. Protection strategies against poaching and habitat loss are also integral to understanding the broader context of elephant conservation efforts.

Explanation:

The problem of elephants destroying trees in southern Africa is often attributed to a combination of factors, primarily overpopulation and competition for resources. Due to conservation efforts, elephant populations have rebounded in many areas, but this success can lead to increased pressure on the environment. As dominant ecosystem engineers, elephants can significantly affect biodiversity and ecosystem processes based on their population density. Moreover, the impact on tree species within protected areas can be assessed by recording the types of damage inflicted on trees, such as broken branches and bark stripping. Understanding why elephants damage trees involves examining their diet and movement patterns through behavioural ecology. By calculating an acceptability index of each tree species (eaten versus available), researchers gain insight into the foraging preferences of elephants, which helps to clarify whether the destruction is due to the preference for certain tree species or if the trees are damaged as byproduct of elephants' movements.

Poaching, habitat loss, and human-elephant conflict also influence the dynamics between elephants, their environment, and local communities. Strategies to protect elephants from poachers, such as establishing national parks and creating ecotourism opportunities, provide varying levels of effectiveness and incentives for conservation efforts, impacting both elephant populations and their habitats.

General Formula: (CH2O)n where n is the number of carbon atoms. example: The sugar glucose is a small carbohydrate; its n equals 6. Therefore, its chemical formula is __________

Answers

Answer: C6H12O6

Explanation: glucose is the simplest sugar. As N is the number of the carbon atom, when we multiply 6 into the inner basic formula then (CH2O) convert into C6H12O6. As the number of carbon atom changed the formula of sugar also changed.

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What is it equivalent expression for 3(x+9)-2 When information is disclosed to individuals who are not authorized to see it, a _____ has been suffered. A thermogram of a house shows high amounts of thermal energy around the windows but not around the roof. Which conclusion is best supported by the thermogram?A)The windows take in a lot of solar radiation.B)The roof takes in a lot of solar radiation.C)The windows are not energy efficient, but the roof is.D)The roof is not energy efficient, but the windows are. What is the molar mass of ammonium hydroxide? Question 10 options: 32 g/mol none of these 35 g/mol 77 g/mol Kelly Fisher invested a total of $20,000 invested in two municipal bonds that have yields of 8% (bond A) and 10% (bond B) interest per year, respectively. If the interest Kelly receives from the bonds in a year is $1720, how much did she invest in each bond? In a photoelectric effect experiment, electrons are ejected from a titanium surface (work function, 3 eV) following irradiation with UV light. The energy of the incident UV light is 7.2 x 10-19 J.(a) Calculate the wavelength of the ejected electrons.(b) Calculate the wavelength of the incident UV light.(c) would an iron surface (-4.7 eV require a longer or shorter wavelength of light to eject electrons with the same wavelength calculated in part (a)? Briefly explain. In high-context cultures, ____________ language may be perceived as rude, individualistic, and disrespectful. An ornament of mass 42.0 g is attached to a vertical ideal spring with a force constant (spring constant) of 33.9 N/m. The ornament is then lowered very slowly until the spring stops stretching. How much does the spring stretch? Complete the statement using always, sometimes, or never.A quadrilateral isa trapezoid.a.) alwaysb.) sometimesc.) never Shaping is the reinforcement of successive _______. a) responses. b) elements of a chain. c) approximations of a desired behavior. d) increases in the intensity or topography of a behavior. Imagine that two charged objects are the system of interest. When the objects are infinitely far from each other, the electric potential energy of the system is zero. When the objects are close to each other, the electric potential energy is positive. Which of the following statements is(are) incorrect(a) Both objects are positively charged.(b) Both objects are negatively charged.(c) One object is negatively charged and the other one is positively charged. A party that has lost at appeal may file which of the following to argue why a case should be heard by a Supreme Court. A. a writ of mandamus. B. a writ of habeas corpus. C. a writ of quo warranto. D. a writ of scire facias. E. a writ of certiorari . The building of the erie canal in the 1820s to connect new york city to the midwest was paid for by the state of new york, it is an example of_____________. To study the evolutionary relationships of the earliest forms of life on Earth we need to examine a structure that is present in all cells and changes very slowly over time. All life on Earth was initially divided into three main Domains: the Bacteria, the Archaea, and the Eukarya, based on the similarities of their Structures that are similar in structure but different in function Human blood pressure levels are normally distributed. If you measured an individual's blood pressure and found the blood pressure level to have a z-score of 2.1, what would you conclude about that person?a. The individual's blood pressure is unusually high, compared to others.b. The individual's blood pressure is 2.1 times higher than the average person.c. The individual's blood pressure level is about average, compared to others.d. Since the z-score is positive we know that the individual has normal blood pressure, compared to others. How do you write the difference of a number and eight, divided by ten Max is a diver. He uses positive numbers to represent elevations above the water's surface and negative numbers to represent elevations below the water's surface. Max is standing on the springboard. He represent his location as 3 meters. He lets a ring drop to the bottom of the pool. He represents its location at the bottom of the pool as -4 meters. How many meters below the surface of the water is the ring? A. Less than 4 meters B. More than 4 meters C. Exactly 4 meters D. Exactly 3 meters Please help: :) What counting rule involves the computation of the number of ways that a set of objects can be arranged in order The statement, "Formal and informal education serve certain crucial purposes in society, especially as societies modernize," most closely reflects ______.a. symbolic interaction theoryb. conflict theoryc. structural-functional theoryd. rational choice theory Steam Workshop Downloader