Which of the following is/are true about ADH? a. It promotes obligatory water reabsorption, b. it is secreted in response to an increase in extracellular fluid osmolality, c. it causes insertion of aquaporins in the PCT, d. it promotes Na⁺ reabsorption.

Video transcript

Hello, everyone and welcome to today's video. Today, we need to identify the incorrect statement about a DH as answer choice. A we have it is a peptide hormone secreted by the posterior PB. It is secreted when the osmolarity of the plasma increases. C we have it inserts Arop in the collecting duct of the Nephron D. It promotes sodium reabsorption from the collecting ducts. Now, this A DH is going to be this peptide hormone that is going to be secreted by the posterior PTU theory, especially in times when we are dehydrated. Now, it is going to function by inserting aqua points in the collecting duct of the Nephron. And these aqua points are going to allow the reabsorption of H2O into the bloodstream. And we do this because remember that we are dehydrated. So we are trying to save water. So we release this peptide hormone, we release A DH in order to help with water reabsorption, which is going to eventually create a urine that is very concentrated with solutes but has a little water because remember that we're trying to conserve this water. Therefore, the correct answer for this question is going to be the, it promotes sodium reabsorption from the collecting ducts. But why? Well, we said that it is going to promote water, not solute or sodium reabsorption in the collecting ducts. So it's going to be the incorrect statement that we were looking for to answer choice. D it promotes sodium reabsorption from the collecting ducts. It's going to be the final answer to our question. I really hope this video helped you and I hope to see you on the next one.