The reabsorption of $Na^+$ from the kidney is highly affected by which hormone?

What is the significance of the juxtaglomerular apparatus $(JGA)$ in kidney function?

Aldosterone stimulates the reabsorption of

The kidneys not only remove the waste products from the blood but also play a very important role in maintaining:

Angiotensinogen is a protein secreted by which of the following organs?

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 $ANP$.