For people over 50, alcohol may positively affect the cardiovascular system by
Alcohol may positively affect the cardiovascular system of people over 50 years old by reducing the risk of clot formation.
Just like with the other body systems, excessive alcohol can have lethal effects on the cardiovascular system. Chronic alcohol use can upsurge the workload of the heart which can then lead to arrhythmia's or what is called an irregular heart beat, inflammation of the heart muscle or myocarditis, weakening of the heart muscle or cardiomyopathy, increased cholesterol, and even hypertension. Other problems are prominent with blood clotting and an increased workload of the heart that is linked to cirrhosis of the liver.
When an experimenter stimulates a rat's lateral hypothalamus the most likely result is?
Predict the likely effect of continued deforestation on plant and animal life.
As it well known fact that 70-80% of the plants and land animals live in forest, continuous deforestation may lead to threatening of various species. Large number of trees in forest help by blocking the sun ray's during the day and by retaining the heat during night. Deforestation would lead to disruption of such phenomenon further leading to extreme temperatures harming the plants and animals.
Which conclusion best supported by the information?
Answer:
Option B
Explanation:
Both plants and animals can reproduce asexually, therefore option A is incorrect
Organisms that reproduce sexually have the advantage to produce genetically diverse offspring. Hence, option C is incorrect
Heterotrophs can reproduce both sexually and asexually, hence there is not no relation between being heterotroph and reproducing either asexually or sexually. Hence option D is also incorrect
If an organism reproduces asexually, then there is no pressure on it to select its mate. Hence, option B is correct
Behaviors that stem from innate, automatic behavioral tendencies that will occur reliably in all members of a species in response to some sort of cue from the environment, are called
What does an ant use to keep all of its hair in place?
In the instrumental (linear) pattern of grieving how is grief experienced and expressed
A property of t cells, but not b cells, is their __________.
When you spin around, you lose balance because of fluid spinning around in the _____. A. cochlea B. tympanic membrane C. semicircular canals D. auricle
Answer: Semi circular canals.
Explanation: These are three fluid filled canals located in the inner ear that is helps us to maintain the balance.
When the head is moved around, the fluid moves the hair inside and these tiny hair sens the message to the nerve cell ( brain).
But when you move around the liquid keeps on sending the message to the brain that you are moving a bit longer and the body loses its balance.
In the desert food web shown below, which of the following best describes the transfer of energy between the desert tortoise and the coyote?
A) About 90 percent of the desert tortoise's energy transfers to the coyote.
B) About 10 percent of the coyote's energy transfers to the desert tortoise.
C) About 10 percent of the desert tortoise's energy transfers to the coyote.
D) About 90 percent of the coyote's energy transfers to the desert tortoise.
Answer:
C) About 10 percent of the desert tortoise's energy transfers to the coyote.
Explanation:
In the given food web, the coyote is the top consumer that feeds on desert tortoise and kangaroo rat. Only 10% of the energy of one trophic level is passed to the next trophic level and 90 % of the energy is lost in respiration.
Hence, only 10% energy of desert tortoise would be delivered to coyote and rest would be lost during respiration.
Which method of collecting data would provide the most accurate information about how an ecosystem is being affected by human development?
The people in the neighborhood record the number of birds they see in the area both before and after the constructions of a new building.
Deer in the area are identified before construction so that scientists can see where they go after the building is finished.
More trees are planted in the area around the construction site to allow the animals a new place to live.
The population size is recorded for each species present in the construction area before and after the building is completed.
Differentiation of cells changes the nucleic information. True or false?
What do all living things need?
a. energy, water, sunshine, protection
b. food, water, air, a place to live
c. oxygen, outer covering, parents, vitamins
d. water, parents, a place to live, air
Plant and animal cells make exact copies through the process of
A) mitosis.
B) oxidation.
C) segmentation.
D) interactive replacement.
Plant and animal cells make exact copies through the process of - MITOSIS
Mitosis is a process or a type of cell division where a cell is duplicated into two cells called the daughter cells. Both these daughter cells have the same number and kind of chromosomes as the parent nucleus.
The blood vessel that carries blood containing oxygen and nutrients away from the heart to the body tissues (except the lungs) is the
Uncovered lightbulbs may expose food to which type of hazard ?
Answer:
Physical Hazard
Explanation:
An hazard is defined as something or a substance that by itself or due to its interaction or combination with another substance has the potential to cause harm.
We have 3 types of hazards.
a. Physical Hazard: This has to do with substances such as: uncovered light bulbs
b. Chemical Hazard: This has to do with chemical substances e.g. Acids, Bases, Pesticides, radioactive substances, e.t.c.
c. Biological Hazard: For example microorganisms such as Viruses, Bacteria and Fungi
Uncovered light bulbs may expose foods to physical hazard such as if the light bulbs get shattered , the presence of broken light bulb shards in food is very harmful.
Which of these happens during the postabsorptive state?
Name the valve (sphincter) located between the stomach and the duodenum
The "pyloric sphincter" which located between the stomach and the duodenum.
What is pyloric sphincter?The movement of food from the stomach into the esophagus is controlled by the pyloric sphincter at its base.
What is duodenum?The beginning of the small intestine would be the duodenum. The duodenum's primary function is to finish the first stage of digestion. Food first from the stomach has been combined with pancreatic enzymes and gallbladder bile in this area of the intestine. Bile as well as the enzymes aid in food digestion.
The smooth muscle ring known as the pyloric sphincter separates the small intestine from the stomach. It opens and shuts to regulate the movement of stomach juices as well as partially digested food first from the pylorus towards the duodenum.
Therefore, the "pyloric sphincter" which located between the stomach and the duodenum.
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which component of human milk carries out phagocytosis of bacteria and production of complement proteins?
what shape would be the most desirable for larger cells?
Final answer:
The most desirable shape for larger cells is one that maximizes surface area to volume ratio for efficient exchange of nutrients and waste, often a sphere. Various cell shapes can also result from functional requirements or physical constraints influencing cellular function.
Explanation:
The most desirable shape for larger cells would be one that maximizes the surface area to volume ratio, to ensure efficient exchange of nutrients and waste. Cells that are too large may not be able to support the rate of diffusion required for their volume due to a decreased surface area-to-volume ratio. Spherical shapes tend to be the most efficient in terms of surface area-to-volume ratio because as the cell increases in size, a sphere's surface area increases as the square of its radius, while its volume increases as the cube of its radius.
Considering two cells, a spherical cell with a diameter of 5 µm would likely exchange nutrients and wastes more efficiently than a cubed-shaped cell with a side length of 7µm. The surface area-to-volume ratio for a sphere is higher than that of a cube, resulting in shorter distances for nutrients and wastes to travel to and from the cell's periphery, leading to faster molecular exchange rates.
Cell shapes can also be affected by physical forces and functional requirements. For example, red blood cells adopt a biconcave disc shape to optimize the exchange of oxygen, whereas nerve cells have long extensions to aid in signal transmission. Thus, while most cells approximate a sphere for efficiency, different shapes can arise from the cell's necessity to fulfill specific roles within an organism.
It is crucial that the process of mitosis is error free. This is because otherwise healthy cells can
The right answer is Become cancer cells.
To multiply constantly, cancer cells bypass many regulations of cell proliferation, which leads them to proliferate uncontrollably. These cells have several solutions to prevent senescence.
In a healthy situation, a cell needs growth factors to proliferate. In a cancerous situation, the cancer cell can mutate an oncogene so that it permanently generates proliferation signals, regardless of the presence of growth factors.
For a cell to proliferate, the critical point it must pass through the cell cycle is the restriction point maintained by the Rb protein. Proliferation signals must be sustained to inactivate this control point as the rest of the cell cycle progresses without external stimulation. To proliferate excessively, the cancer cells thus overactivate the cell proliferation signals to pass the restriction point as quickly as possible. They use several strategies to over-activate these signals.
Homo sapiens have 23 pairs of chromosomes. this implies that ________.
It implies that There are 46 chromosomes (dsDNA (double-stranded) molecules) are present in each somatic cell.
Homo sapiens has 46 chromosomes divided into 23 pairs: 22 pairs of autosomes and 1 pair of gonosomes or sex chromosomes, called X and Y. Male individuals have X and Y (XY) chromosomes. Female individuals have 2 X (XX) chromosomes.
Aneuploidy is an abnormal change in the number of chromosomes in a cell or organism (for example 45 or 47 chromosomes).
In addition to the chromosomes in the nucleus, human cells have DNA in the mitochondria (circular DNA).
How many amino acids are affected by a change in one nitrogen base?answer?
It changes one amino acid in the genetic code if a change in one nitrogen base occurs because one triplet codon is responsible to make one amino acid.
What is genetic code?DNA is the genetic material that stores information about the organism, this information is first converted into RNA by the process of transcription. After the transcription, this information is converted into the amino acid sequence.
Genetic code is the triplet sequence of a nitrogen base, which codes for the protein if any base is changed with another base, it will change the amino acid. Amino acid is made by triplet code, three bases are responsible for one amino acid.
Therefore, one amino acid is affected by a change in one nitrogen base, due to a triplet genetic codon.
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All organisms require nitrogen to make amino acids, which in turn are used to build carbohydrates
Final answer:
Organisms require nitrogen to synthesize amino acids, the building blocks of proteins, not carbohydrates. Nitrogen fixation by microorganisms converts atmospheric nitrogen into forms usable by plants, which animals then consume, making it a critical component of the nitrogen cycle.
Explanation:
The original statement that all organisms require nitrogen to make amino acids, which in turn are used to build carbohydrates, contains an error. In fact, organisms use nitrogen to synthesize amino acids, which are the building blocks of proteins, rather than carbohydrates. Atmospheric nitrogen (N2), which makes up about 79% of Earth's atmosphere, cannot be utilized directly by most organisms. Through a process called nitrogen fixation, certain microorganisms convert atmospheric nitrogen into forms that plants can absorb, such as nitrate ions (NO3−) and ammonium ions (NH4+). Once assimilated by plants, these nitrogen compounds can be incorporated into amino acids and eventually proteins. Animals obtain their nitrogen by consuming plants or other animals. The cycling of nitrogen between the atmosphere, soil, plants, and animals is an integral part of the nitrogen cycle, which is crucial for life on Earth.
Large families may suffer from _______________________ when resources are spread too thin
Which femoral structure is located at the distal end of the medial supracondylar ridge?
Final answer:
The adductor tubercle is the femoral structure found at the distal end of the medial supracondylar ridge, serving as an attachment point for the adductor magnus muscle.
Explanation:
Femoral Structure at the Distal End of Medial Supracondylar Ridge
The femoral structure located at the distal end of the medial supracondylar ridge of the femur is known as the adductor tubercle. This small protrusion is found on the medial condyle and serves as the point of attachment for the adductor magnus muscle. The medial epicondyle of the femur is a roughened area on the distal femur located on the medial side of the medial condyle, just above the adductor tubercle. The medial supracondylar ridge is a bony ridge that extends from the adductor tubercle down the shaft of the femur. The structures of the distal end of the femur, including the medial and lateral condyles, the epicondyles, and the patellar surface, articulate with the tibia to form the knee joint and provide attachment points for muscles and supporting ligaments.
3 reasons why determining cause of death can be difficult
When the genotype consists of a dominant and a recessive allele, the phenotype will be like the:?
What part of a neuron receives signals and sends a message to the cell body? what part of a neuron receives signals and sends a message to the cell body? axon terminal axon dendrite axon hillock?
The dendrite of a neuron receives signals and sends them to the cell body. The signals then move through the axon to the axon terminal, which transmits the signal to other neurons. The axon hillock is where the axon connects to the cell body and where signal transmission begins.
Explanation:The part of a neuron that receives signals and sends a message to the cell body is called the dendrite. Each neuron has many dendrites, which are designed to receive chemical signals from other neurons and transmit these signals to the cell body. The signals then move further down the neuron through the axon, reaching the axon terminal, which is responsible for transmitting the signal to the next neuron.
The axon hillock is also an important part of this process as it is the area where the axon connects to the cell body and where the initiation of signal transmission to other neurons begins.
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Which statement correctly describes the bars on a bar graph representing the data?
The right answer is C.
A bar chart, also known as bar graph or column diagram, is a way to graphically represent a set of data or values, and is made up of rectangular bars of lengths proportional to the values represented. Bar graphs are used to compare two or more values. The bars can be oriented horizontally or vertically.
Since the value obtained at very low concentration (30) is twice the value obtained at average concentration (15), it can be deduced that "C" is a correct answer. The other answers are false.