Question 2 Radioactive tracers are useful in ____.A)calculating the ages of fossils

B)determining medical problems

C)fueling nuclear reactions

D)treating brain tumors

Answers

Answer 1

Answer:

Radioactive tracers are useful in determining medical problems.

Answer: B. Determining medical problems.

Explanation:

Radioactive tracers are comprised of carrier particles that are reinforced firmly to a radioactive atom. These bearer particles shift incredibly relying upon the motivation behind the scan.

A few tracers utilize atoms that associate with a particular protein or sugar in the body and can even utilize the patient's very own cells.

Examples of radioactive tracer are - tritium, carbon-11, carbon-14 and oxygen-15 and so forth. Radioactive tracers are either injected in the body intravenously or orally.

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What takes place when you inhale and exhale

Answers

When we inhale and exhale respiration takes place. Food is broken glucose is made and the blood is oxidized It is an important process for living organisms

when we inhale and exhale breathing takes place.it is essential to every living being

Which of the following is a type of wave that does not need a medium though which to travel?a. Equilibrium
b. Longitudinal
c. Amplitude
d. Transverse

Answers

C) Amplitude wave is the type of wave that does not need a medium through which to travel.

it is c for fact beacuse its wave amptiuted and everybody knos thats the ansear

a defect in which of the following molecules would dramatically reduce the rate of diffusion of water across cell membranes?

Answers

A defect in the aquaporin molecule would dramatically reduce the rate of diffusion of water across cell membranes.

Aquaporins are a type of protein that form channels in the cell membrane, allowing for the rapid diffusion of water across the membrane. These proteins are essential for the movement of water in and out of cells, and play a crucial role in regulating the balance of fluids in the body. If there is a defect in the aquaporin molecule, the rate of diffusion of water across cell membranes would be significantly reduced, leading to potential problems with fluid balance and cell function.

In summary, a defect in the aquaporin molecule would dramatically reduce the rate of diffusion of water across cell membranes, potentially leading to problems with fluid balance and cell function.

Learn more about Diffusion of Water: brainly.com/question/233933

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Which color of light does chlorophyll b absorb more than any other color

Answers

Ans.

Chlorophyll b is a green colored, accessory photosynthetic pigment that helps in the process of photosynthesis by collecting enegry. It traps solar energy and transfers it to the chlorophyll a.

Chlorophyll b absorbs red and blue light of electromagnetic spectrum, which ranges from 650-680 and 450-480 nano meter. The light primarily absorbed by the chlorophyll b is blue light.

Thus, the correct answer is 'blue light.'

I'm going to say chlorophyll b absorbs RED (650nm) and VIOLET BLUE (450nm)

Hopefully this helped and good luck

Squirrels and chipmunks compete for the same food source. What is most likely to happen to the degree of competition between these two species if their food became scarce?

Answers

The right answer is "increase". On the off chance that there's less food for them to eat,, they are going for a battle for it more on the grounds that both will need the little measures of nourishment that they scarcely get. The opposition increments.

The degree of competition between these two species is going to increase if their food becomes scarce. Given that both squirrels and chipmunks eat the same food, if there are smaller amounts of it, obviously both species are going to fight for it or else they will die. It is the survival of the fittest - those who can fight for their food and lives will survive, whereas the others will perish.

Secretion of cholecystokinin from the intestinal wall is stimulated by

Answers

Answer:

The correct answer is: fat in the small intestine.

Explanation:

Cholecystokinin, abbreviated to CCK, is a hormone produced in the small intestine that participates in digestion. Its secretion is stimulated by fatty acids in the small intestine (more specifically, in the duodenum) and by the introduction of hydrochloric acid.

Cholecystokinin has the functions to 1) contract the gallbladder so it releases the stored bile into the intestine, and 2) stimulate the secretion of pancreatic juice, which induces satiety.

Final answer:

Cholecystokinin's secretion is primarily triggered by fatty acids and specific amino acids in the small intestine, aiding in their digestion through the release of bile from the gallbladder and enzymes from the pancreas.

Explanation:

The secretion of cholecystokinin from the intestinal wall is mainly stimulated by the presence of fatty acids and certain amino acids in the small intestine's duodenum. Cholecystokinin is a vital hormone that aids in digestion. When fatty acids or certain specific amino acids, such as phenylalanine or tryptophan, enter the duodenum, they trigger the release of this hormone. This hormone then assists in the digestion of these substances by stimulating the gallbladder to release bile and the pancreas to release pancreatic enzymes.