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3 years ago

Which of the following are examples of facilitated diffusion?

Biology

1 answer:

avanturin [10]3 years ago

8 0

A. A chloride ion moves across the plasma membrane from a higher to lower concentration inside the cell.

Explanation:

Diffusion is the movement of particles from a region of higher concentration to that of lower concentration. Sometimes diffusion may require energy input to drive it.

In facilitated diffusion, the concentration gradient creates the drive that fosters the diffusion.
A membrane allows for the movement of tiny particles of matter across two regions.
When the concentration in a region is above that of another, particles will move from the area having high concentration to that with a lower concentration till they both attain uniform concentration.
This is known as facilitated diffusion.

Learn more:

diffusion brainly.com/question/5825825

#learnwithBrainly

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In the body, red blood cells have a much shorter lifetime than cheek cells.

anyanavicka [17]

Red blood cells do not have a nucleus.
It does not consist of a cell membrane or a cytoplasm.
It simply only transports oxygen around the body.
Pls mark me brainliest:)

8 0

2 years ago

What percent of energy is transferred between the levels indicated by the blue arrows? (3 points)

andrew11 [14]

10% I think because it’s closer to the top

4 0

3 years ago

Read 2 more answers

Researchers are studying the abnormal activity of kinases in relation to cancer. Theoretically, how might researchers use signal

myrzilka [38]

Answer:

I am pretty sure that the answer is A.

Explanation:

Protein kinases regulate the cell cycle by giving the "go-ahead" or "stop" signal at checkpoints in the cycle. A mutation/disruption in the protein kinases can result in it not doing its job properly. As a result, it can give the 'go-ahead' signal to all cells (mutated or not) to continue through the cell cycle. A distrupted kinase will infleunce the enviornment for a cancer cell as the cancer cell can continue to divide continuously.

I do not think the answer is D because G-couped receptirs are not involed in the regulation of the cell cycle. Additionally, I do not think the answer is C since the production of cAMP (a secondary messgenger amplifies transduction signals; this doesn't have anything to do with cancer?) Finally, between A and B I know that a direct result of cancer is due to a distruption in either protien kinases or growth factors (not in the answer choices). Since one of the factors that leads to cancer is present in answer choice A, I think that is the one. However, this is just my reasoning, I am not 100% sure!

3 0

2 years ago

I need help I will mark brainliest Can someone give me the step by step answer

OLga [1]

Answer

68.6 m

Explanation:

Given-

Mass = 0.5 kg
Potential energy = 34.3 J

To find -

Height of the tree upto which the squirrel climbed.

Solution-

Potential energy of a body = mgh

34.3 = 0.5×h (mg = 0.5kg)

h = 34.3/0.5

= 68.6 m

Option third.

4 0

2 years ago

If an organism has 46 chromosomes in their somatic cells, how many chromosomes do they have in their gametes?

Alexus [3.1K]

Human somatic cells have 46 chromosomes, including 22 homologous pairs and one pair of nonhomologous sex chromosomes. This is the 2n, or diploid, condition. Human gametes have 23 chromosomes, one each of 23 unique chromosomes. This is the n, or haploid, condition.

5 0

2 years ago