How does ADH regulate body fluid volume? Explain.
Excessive loss of fluid from the body activates osmoreceptors, which stimulate the hypothalamus to release ADH from the neurohypopysis. ADH facilitates water reabsorption from posterior parts of tubule. An increase in body fluid volume can switch off the osmoreceptors and suppress the ADH release to complete the feedback. ADH also causes constrictory effects on blood vessels.