A two-headed muscle (part of hamstring)
a. Vastus lateralis
b. Biceps femoris
Answer:
I believe this is the Biceps femoris
Explanation:
True or False. Before you attempt to expose muscles of the abdomen, you should clear away excess connective tissue with your fingers and probe. This is done so we can see the muscles more clearly.
Hope this helped.
Answer: Im not completely sure but I believe that is true as they do soemthing similiar in other types of surgeries.
Fungi cannot make their own food through photosynthesis. How do they take in nutrients?
essay question
Answer: Saprophytic mode of nutrition
Explanation:
Fungi are the group of organism that feed on the dead and decaying organism by feeding on them.
Fungi release digestive enzymes and performs extracellular digestion on it.They breakdown the complex organic food material into simple nutrients that can be absorbed by fungi.
This is how the fungi obtain energy to survive.
You are a scientist. Somehow, you get a hold of a sample from a celestial body located far away from Earth. Some of your colleagues allege that the sample has evidence of life in that other part of the universe. What tests would you perform to support the hypothesis that the sample may have contained traces of past life?
Compact bone has columns of tissue called?
Answer:
Haversian system or Osteon
Explanation:
The cylindrical shaped units present in compact bones are called Haversian systems. Also called as osteon, each Haversian system has a matrix in the form of thin layers. These thin layers of the matrix are called lamellae and are arranged in concentric layers called central canals. The space between the lamellae of each osteon is occupied by osteocytes.
List the divisions of the brain from the "lowest" to the "highest" in terms of info. processing
1. Medulla Oblongata
2. Cerebrum
3. Hypothalamus
4. Cerebellum
5. Pons
6. Midbrain
a. 1, 3, 5, 2, 4, 6
b. 3, 4, 2, 1, 6, 5
c. 1, 5, 4, 6, 3, 2
d. 6, 3, 2, 4, 1, 5
e. 1, 5, 3, 6, 4, 2
The answer is C. 1, 5, 4, 6, 3, 2.
Brain's medulla oblongata is located at its base. Because of its location, where your brain and spinal cord converge, it serves as a vital pathway for nerve messages traveling to and from your body. Thus, option C is correct.
What is Cerebrum, part of brain?White matter and gray matter make up the cerebrum's (the front of the brain's) core. The cerebral cortex is made up of gray matter.
Movement is initiated, coordinated, and temperature is regulated by the cerebrum, which is the biggest portion of the brain.
The top most region of the brain is called the cerebrum. It has two hemispheres, which are separated by a central fissure.
The main lobes of the brain are located in the cerebrum, which is also where the body is controlled and where information from the sense organs is received and given meaning.
Therefore, Medulla from the “lowest” to Cerebrum the “highest” in terms of info. Processing.
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Describe the neurulation process beginning with the formation of the notochord
Answer:
The neurulation process involves two steps: Primary neural induction and Secondary neural induction.
Explanation:
Neurulation may be defined as the process of formation of neural tube from the neural plate. Neurulation starts when the notochord induces the formation of central nervous system.
Two main stages of neurulation are:
Primary neural induction: Primary neurulation is the process of transformation of flat neural plate into circular neural plate. Gene products gradient determines the induction of neural plate.
Secondary neurulation: The medullary cord is formed by the neural ectoderm and endoderm. Cavites formed from the medullary cord changes into the single neural tube.
What circulates through the ventricles? What is the function?
Answer:
Cereberospinal fluid circulates through the ventricles.
The main function is cereberospinal fluid is the protection from the shock and distribute nutrients..
Explanation:
Ventricles are the four cavites of braion. Cereberospinal fluid is filled in these ventricles. This fluid is colorless, clear and produced by the ependymal cells.
Cereberospinal fluid has the ability to absorb the physical shock and thus protect the brain from any shock. This fluid helps in the exchange of nutrients and removal of waste material from the tissues. Cereberospinal fluid provides the stable chemical environment to the nervous tissue.
PCR amplification of DNA is a useful technique when
there is limited sample.
there is abundant sample.
there is no other evidence.
contamination of evidence occurred.
dental evidence is excluded.
Answer: there is limited sample.
Explanation:
Polymerase chain reaction is a technique that is used for amplifying samples of DNA in vitro. This technique was discovered by Kary Mullis. It can be useful for producing multiple copies of DNA available in very low amounts. It can amplify genomic DNA 50- 250 ng and 1-10 pg for viral or plasmid DNA.
The PCR process involves 3 steps which take place within apparatus thermal cycler. The three steps are:
1. Denaturation: The DNA sample is heated at 94 degree celsius. In this the double stranded DNA is converted into individual single strands.
2. Annealing: The next step involves the attachment of each single stranded DNA with a primer. This step takes place at 60 degree celsius.
3. Extension: In this under the influnece of enzyme Taq polymerase, single nucleotide bases are added to the primers. This step takes place at 72 degree celsius. Entire complentary strand build up this way by each single strand. And a new copy of double stranded DNA is produced from each single strand.
The fate of amino acids after they enter body cells by active transport is that they are
A) Quickly synthesized into glucose
B) Quickly synthesized by liver enzymes and carried to the blood stream
C) Almost immediately synthesized into proteins
D) Oxidized
Synapses...
a) are found only in the central nervous system
b) carry electrical signals along the length of an axon
c) are gaps between neurons where chemical signals are used to transmit information
d) allow electrical signal to jump between myelin segments
Answer:
(c). are gaps between neurons where chemical signals are used to transmit information
Explanation:
Synapses can be defined as junction present between two nerve cells, through which nerve impulses are transmitted by using chemical signals or neurotransmitters. The synapses represent a small gaps that separate two neurons.
The neurotransmitters are released by ending of presynaptic neuron and allows transmission of signals from presynaptic neuron to postsynaptic neuron. Hence, synapses are necessary for unidirectional flow of impulses.
Thus, the correct answer is option (c).
A microbe is discovered growing beside a deep sea thermal vent near the Galapagos Islands. When researchers bring a sample up to the surface and try to grow it in a lab at room temperature in a normal incubator, they are unsuccessful. Why? A. A barophilic organism might not grow since the pressure is not the same at sea-level as it is on the ocean floor B. Salt concentrations might be different in the media the researchers are attempting to use and the salt water the microbe is used to living in, causing osmotic pressure differences that the microbe cannot tolerate. C. All of the above D. It is possible the microbe is a strict anaerobe and is poisoned by the air (oxygen) in the lab E. It may be a psychrophile - enzymes in the cells are probably outside of their normal operating range at room temperature and therefore nonfunctional
Answer:
The correct option is ALL OF THE ABOVE.
Explanation:
Microbes that live in deep sea thermal vents have characteristics that are quite different from those of microbes that are found in other places. Microbes that live in deep sea thermal vent do not need sunlight and oxygen to survive. Thermal vent microbes lives in salty environments, whose pressure is different from the pressure that is found on the earth surface. Also, the temperature, at which these micro organisms can survive is very high compare to those of microbes that are found at other locations.
Based on these characteristics, a microbe that is found growing near a deep sea thermal vent can not survive at normal room temperature. For the micro organism to grow, the researchers has to duplicate the extreme environmental conditions that are found in the thermal vent, which is the original habitat of the microorganism.
The microbe from the deep sea thermal vent has specialized requirements and may not grow in standard lab conditions due to differences in pressure, salt concentration, oxygen levels, or temperature, which all align with answer C, "All of the above."
Researchers may be unsuccessful at growing the recently discovered microbe from the deep sea thermal vent near the Galapagos Islands due to a variety of specialized conditions that these microorganisms require. Answer C, "All of the above," is correct because there are several factors affecting the growth of these microbes in a lab setting at surface pressure and temperature. These microbes could be barophilic organisms that cannot survive without the high pressure present at the bottom of the ocean, or they may be unable to tolerate the osmotic pressure differences caused by dissimilar salt concentrations in the lab media. Additionally, being strict anaerobes, they could be poisoned by the oxygen in the lab or they might be psychrophiles whose enzymes operate outside their normal range at room temperature. These are all potential reasons why these extremophile bacteria fail to grow under typical lab conditions.
Explain the cellular functions that occur when antibiotics attack a bacteria cell.
a. antibiotics target the cell wall, cell membrane, and the processes of protein and nucleic acids production in bacteria to rupture the cell.
b. antibiotics create dormant resistant endospores to preserve the genetic material and rupture the cell.
c. antibiotics target the cell wall and form a bridge-like connection to form conjugation.
d. antibiotics use binary fission to grow twice its size, replications its DNA, and split into two cells.
Answer: A, antibiotics target the cell wall, cell membrane, and the processes of protein and nucleic acids production in bacteria to rupture the cell.
Explanation:
Because I am smort. I got a big fat brain.
Thin filaments are composed of three proteins. Which one is the longest?
a. Myosin
b. tropomyocin
c. troponin
Answer:
b. tropomyocin
Explanation:
The thin filament is made up of three proteins mainly. These are actin, troponin, and tropomyosin.
Among these three proteins of the thin filament, actin and troponin are globular proteins. The globular proteins have a spherical shape and are shorter in length.
On the other hand, tropomyosin is a rod-shaped protein. Each molecule of tropomyosin has around 284 amino acids. The protein is helix in nature and has a filamentous structure. Hence, among the three proteins of the thin filament, tropomyosin is the longest one. One molecule of tropomyosin can cover the seven molecules of actin proteins.
The manubrium articulates with the ________ on its superior border.
The manubrium articulates with the clavicles on its superior border.
What is produced from pyruvic acid when O2 levels are low
A. Acetyl coenzyme A
B. ATP
C. Glucose-6-phosphate
D. Lactic acid
E. Pyruvic acid
Answer:
pyruvic acid converts into lactic acid when there is a lack of oxygen
The organ that produces a secretion that contains fructose, prostaglandin and fibrinogenm is the ____?
A) seminal gland (seminal vesicle)
B) preputial gland
C) corpus cavernosum
D) bulbourethral gland
E) prostate gland
The seminal gland (seminal vesicle) is responsible for producing a secretion that includes fructose, prostaglandin, and fibrinogen, which are essential for sperm viability and fertilization, option A is correct.
The organ that produces a secretion containing fructose, prostaglandin, and fibrinogen is the seminal gland (seminal vesicle). These components are crucial for the viability and motility of sperm. Fructose provides energy for sperm, prostaglandins help in sperm acclimatization to the female reproductive tract, and fibrinogen contributes to the semen's clotting in the female reproductive tract after ejaculation, which is important for successful fertilization.
Recombinant DNA ________. is the merging of DNA from unrelated organisms to create new genetic varieties is assembled in the lab from mononucleotides was part of the Green Revolution of the 1960s is pollination of one plant by another of the same species is cross-pollination of one plant by a different species
Answer:
Is the merging of DNA from unrelated organisms to create new genetic varieties
Explanation:
Recombinant DNA creates transgenic organisms. Foreign DNA from another species can be incorporated in the genome of another species through several ways such as electroporation and transduction. The transgenic organism will, therefore, exhibit traits coded for by the foreign genetic material. This form of biotechnology/genetic engineering is used to modify characteristics of an organism so it exhibits desired traits.
_____ cells are commonly dispersed (mixed in) with simple columnar epithelial cells. They are responsible for secreting mucus.
a. Mast cells
b. Ciliated
c. Goblet cells
d. Macrophages
e. Red blood cells
Answer:
"Macrophages" cells are commonly dispersed (mixed in) with simple columnar epithelial cells. They are responsible for secreting mucus.
Explanation:
The area monitored by a single receptor is called
a. Neural area
b. Receptor field
c. Receptive field
d. Receptor specificity
e. Receptor modality
I think the answer is C.
Which muscle(s) are used to extend your arms backward?
Answer:
Teres major, posterior deltoid muscle and latissimus dorsi
Explanation:
The muscles that arise from the posterior part of the shoulder joint are involved in the backward movement of the forearm. The posterior deltoid muscle and latissimus dorsi are the primary muscles that bring about the extension of arm (the backward movement of the arm).
Latissimus dorsi is the triangular muscle that arises from the lower part of the spine. It serves to extend the arm and bring it down from the raised position. Teres major is the thick and rounded muscle which also serve in the extension of the arm, that is the backward movement of the arm
The triceps brachii are the primary muscles used to extend the arms backward, working in conjunction with the scapular muscles to stabilize and move the shoulder during this motion.
The muscles used to extend your arms backward are primarily the triceps brachii located on the posterior side of the upper arm. When you want to extend your elbow and push your arm back, the triceps brachii contracts, allowing the forearm to extend away from the body. This contrasts with the biceps brachii, which acts as a flexor of the elbow. In addition to extending the forearm, the triceps brachii works together with scapular muscles to stabilize and move the shoulder, as these muscles assist in lifting the arms at the shoulder and spreading the elbows apart.
What are the responsibilities of the region of the brain highlighted below?
The green area btw
A. Controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities.
B. Regulating important involuntary bodily functions such as blood pressure, heart rate, breathing, and swallowing.
C.Regulating the body’s homeostasis, hunger and eating, thirst and drinking, and other functions of basic survival.
D. Coordinating movement and balance by using information from sensory nerves, including hand-eye coordination.
Answer:
That part of the brain is specifically used for expressing language, so I would say "Controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities." Is the answer. It's known as the Bronca's Area.
Which of the following types of cells can directly kill cells and secretes a chemical known as perforin which accomplishes the killing by producing pore-like openings in the membranes of cells?
a. Cytotoxic T cells
b. Helper T cells
c. Antibodies
d. Natural killer cells
Answer:
Cytotoxic T cells
Explanation:
Perforin is the cytosolic protein and upon degranulation forms pores in the target cell. Perforin protein helps in the transport of water and ions.
Perforin is present in the granules of cytotoxic T cells. These cells have the ability to kill virus infected cells and cancer cells. Cytotoxic T cells bind with the class 1 MHC molecules. These cells are also known as CD8+ T cells.
Thus, the correct answer is option (A).
True or False. An obstruction of the renal artery would cut the blood supply to the liver.
Answer:
Explanation:
False. Renal refers to the kidneys not the liver. But the statement is 1/2 correct. An artery carries blood from the heart to an organ. So that much is correct.
Which is larger?
a. muscle fiber
b. muscle filament
Which of the following is/are phase(s) of the uterine cycle?
a. menstrual phase only
b. both menstrual and secretory phases
c. proliferative phase only
d. secretory phase only
e. menstrual, secretory, and proliferative phases
Answer:
e. menstrual, secretory, and proliferative phases
Explanation:
Proliferative phase (days 5-15) includes thickening of the endometrium of the uterine wall under the influence of estrogen hormone released by developing follicles.
This is followed by secretory phase (days 15-28) during which endometrium proliferate at a fast rate and the matured uterine glands secrete mucoid secretion.
If fertilization does not occur, the secretory phase is followed by menstrual phase (days 1-5) during which the endometrium is disintegrated and the associated blood vessels rupture leading to menses.
Where do sensory nerve cells, parasympathetic ganglia, and symphathetic postganglionic fibers found?
Answer:
These are found in the submucosal plexus
Explanation:
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7. In a free market economy, decisions are made according to the laws of
O supply and demand
O local government
O national government
O wealthy citizens
Answer:
A
Explanation:
In its best form, a free market economy will determine a price by supply and demand.
Local governments can't determine anything unless it is a local commodity or product which will not be used anywhere else. Even then, the government is interfering with supply and demand.
National government -- same answer as local government. Any government interference does not result in a free market economy.
There are not enough wealthy citizens around to influence many markets.
Your best answer is A
Create an analogy describing how 3-4 components of the endocrine system communicate with each other and function effectively. For your analogy, be sure to identify the main glands of the endocrine system and describe their function and explain how control mechanisms of the nervous system regulate endocrine secretion(s). Be thorough in your description and explanation. (20 points possible).
The endocrine system has many glands that interact with each other through feedback mechanisms to ensure that the correct amounts of hormones are produced at the right time.
How does the endocrine system work?Numerous hormones control a variety of bodily processes, including electrolyte balance, growth and development, metabolism, and reproduction.
The body's many glands all create hormones.
A variety of releasing and inhibiting hormones from the brain work on the pituitary gland to promote the production of pituitary hormones.
While some pituitary hormones have an indirect effect on target organs, others act on other glands spread across the body.
The adrenal glands, which predominantly create cortisol, the parathyroid gland, which produces parathyroid hormone, and the pancreas, which produces insulin and glucagon, are additional hormone-producing glands found throughout the body.
Many of these hormones are components of regulatory hormonal cascades that also include hormones from the hypothalamus, the pituitary, and one or more target glands.
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Final answer:
The endocrine system is compared to a city's communication network, with the pituitary gland as the city hall, the thyroid as the power plant, the adrenal glands as emergency services, and the pancreas as waste management.
Explanation:
Analogy of the Endocrine System
Imagine the endocrine system as a sophisticated communication network within a large, bustling city. The pituitary gland is like the city hall, acting as the 'master gland' that sends out directives (hormones) to various districts (other glands) within the city. These districts include the thyroid gland, which is like the power plant, producing hormones that regulate metabolism and energy.
The adrenal glands resemble the emergency services, releasing hormones such as adrenaline, managing the body's stress response. The pancreas is akin to the city's waste management system, controlling the level of glucose in the blood.
The city hall (pituitary gland) receives information from a central intelligence agency (the brain, particularly the hypothalamus), which monitors the environment and sends signals about when and how to act. When the central agency senses a change that requires city hall's attention, such as a drop in temperature (e.g. body needing more heat), it sends a message for the power plant (thyroid gland) to ramp up energy production (increase metabolism).
The communication between the brain and the endocrine system works via a 'dual-carriage' approach, with the nervous system rapidly sending electrical signals and the endocrine system distributing hormonal messages through the bloodstream. Together, they ensure that the city operates smoothly and adapts to both internal and external changes, thus maintaining homeostasis.
Hox genes a. appear to function in similar ways across diverse groups of organisms. b. control the development of language in humans. c. control which amino acids get plugged into polypeptide chains. d. function only in fruit flies.
Answer:
The correct option is A.
Explanation:
Here is the complete sentence: Hox genes APPEAR TO FUNCTION IN SIMILAR WAYS ACROSS DIVERSE GROUP OF ORGANISMS.
Hox genes refer to a group of transcription factor genes that control and regulate animals development. Hox genes function by specifying segment identity, that is, they are responsible for determining the parts of the embryo in which different structures will form. For instance, the genes determines the part of the embryo that will develop into head, legs, stomach, etc.
Hox genes are usually clustered together in a particular spot on the chromosomes and they are present in different forms of animals; the function of hox genes in these animals are similar.