Erythropoietin hormone which stimulates $R.B.C.$ formation is produced by :

Select the correct option with respect to the following statements:
$(a)$ Angiotensin $II$ constricts arterioles in the kidney to reduce blood flow and decreases blood pressure when blood flow to the afferent arteriole decreases.
$(b)$ Angiotensin $II$ stimulates the adrenal cortex to release aldosterone for more absorption of $Na^+$ and $Cl^-$ ions in the $DCT$.
$(c)$ Blood osmolarity varies with the secretion of aldosterone and $ANP$.

Which of the following influences the activity of the kidney?

Which of the following inhibits diuresis?

An excessive loss of fluid from the body can activate osmoreceptors which stimulate the hypothalamus to release .............. from the neurohypophysis.

Volume of urine is regulated by