Question

Prostaglandins concerned with blood pressure regulation originate from renal

• A. Medulla
• B. Cortex
• C. Pyramid
• D. Calyces

Answer 1

Answer: (B)

Cortex

When renal blood flow is reduced (hypotension) or there is a decrease in sodium and chloride ion concentration, the macula densa of the distal tubule releases prostaglandins, which cause the juxtaglomerular cells lining the afferent arterioles to release renin, activating the renin-angiotensin-aldosterone system, to increase blood pressure and increase reabsorption of sodium ions into the bloodstream via aldosterone.