Explain how the amount of water in the body affects the concentration of ions and solutes in the ECF.

Video transcript

Hey, everyone. Let's take a look at this question together. Decreasing the total amount of water in the body means what is it? Answer choice A an increase in the concentration of ions. And so lutes in the extracellular fluid. Answer choice B A decrease in the concentration of ions and solutes in the extracellular fluid. Answer choice C retaining the concentration of ions and solutes in the extracellular fluid or answer choice D none of the above. Let's work this problem out together to try to figure out which of the following answer choices best explains what occurs when we are decreasing the total amount of water in the body. So in order to solve this question, we have to understand what happens when we decrease the total amount of water in the body, which we know that when the total amount of water in the body decreases. Such as in the case of dehydration, de concentrate of ions and solutes in the extracellular fluid increases. And the reason why it increases is that we have the same amount of ions. And so lutes since all we are doing is decreasing, the total amount of water in the body while leaving the amounts of ions and salutes in the body the same. So we have the same amount of ions and solutes and we have less water than we had before, which tells us that the ions and solutes in the extracellular fluid are more concentrated since we have the same amount of ions and solutes, but we have less water than before. So the extracellular fluid is more concentrated or the concentration of those ions and solutes in the extracellular fluid increases. So looking at our answer choices, we can identify answer choice. A as the correct answer. Since it says that decreasing, the total amount of water in the body means that we have an increase in the concentration of ions and salutes in the extracellular fluid. And all other answer choices are incorrect. I hope you found this video to be helpful. Thank you and goodbye.