Question

Please choose the correct answers for the following regarding the RAAS:

This is another story about antidiuretic hormone (ADH). An increase in plasma osmolarity which is detected by ("Osmoreceptors" OR "Baroreceptors") which reports to the   ["CVCC" OR "Kidney" OR "HT/PPG"]  (integrating center) causing increased secretion of the correcting signal ["ADH" OR "ANP" OR "Aldosterone"]         which has receptors on ["Collecting duct only" OR  "Vascular smooth muscle and collecting duct", OR "Vascular smooth muscle only"]. These effector tissues cause ["Increased water absorption and vasoconstriction" OR  "Increased water absorption only" OR "Vasoconstriction only"].

Answer 1

An increase in plasma osmolarity which is detected by Osmoreceptors which reports to the HT/PPG (integrating center) causing increased secretion of the correcting signal ADH which has receptors on Vascular smooth muscle and collecting duct.
These effector tissues cause Increased water absorption and vasoconstriction.

Role of ADH --

Vasopressin, is also known as Anti diuretic hormone (ADH) It is a hormone synthesized in the hypothalamus. It travels down to posterior pituitary.

ADH has two primary functions.

First, it increases the amount of solute-free water from the collecting duct into the circulation from the filtrate in the kidney.

ADH aldo constricts arterioles, which increases peripheral vascular resistance and increases arterial blood pressure

when the volume of ECF decreases with increased osmolality, the supraoptic nucleus is stimulated and ADH is released.