List three ways in which substances can cross the capillary wall.

Video transcript

Everyone. Let's take a look at this question together. What substance leaks out of capillaries due to the normal pressure exerted by the heart and osmotic pressure at the cellular level. Is it answer choice? A extracellular fluid. Answer choice. B blood cells answer choice C intracellular fluid or answer choice D all of the above. Let's work this problem out together to try to figure out which of the following answer choices is the substance that leaks out of the capillaries due to the normal pressure exerted by the heart and osmotic pressure at the cellular level. So, in order to solve this question, we have to recall what we have learned about the substances of the capillaries and which substance would leak out due to that normal pressure exerted by the heart and osmotic pressure at the cellular level, which we can recall that extracellular fluid leaks out of the blood capillary walls because of pressure exerted by the heart or osmotic pressure at the cellular level. And we can see answer choice A is extracellular fluid. So answer choice A is the correct answer. And we know that answer choice B blood cells and answer choice C intracellular fluid is incorrect since both blood cells and intracellular fluid do not leak out of the capillaries unless they are damaged. So, answer choice. A is the only correct answer choice. I hope you found this video to be helpful. Thank you and goodbye.