Renal3

Question 1

What causes Renin secretion? (3)

Answer 1

• Decreased BP (JG cells)
• Decreased Na+ delivery (macula densa)
• Increased sympathetic tone (ß1-receptors)

Question 2

Angiotensin II.

Answer 2

• Affectes baroreceptor function
• Limites reflex bradycardia
• Maintains BAlood Volume and BP

Question 3

Atrial Natriuretic Protein (ANP).

Answer 3

• Released from atria in response to INcreased volume
• Relaxes vascular smooth muscle (via cGMP)
• Increases GFR
• Decreases Renin

Question 4

Antidiuretic Hormone (ADH).

Answer 4

• Regulates Osmolarity

- Responds to low blood volume

Question 5

Aldosterone.

Answer 5

-Regulates blood volume (in Low-volume states)

Question 6

JG cells.

Answer 6

• Modified smooth muscle of Afferent arteriole

- Secrete Renin (1-Low renal BP 2-Low NaCl delivery to distal tubule 3-Increased sympathetic tone-ß1)

Question 7

Macula Densa cells.

Answer 7

• NaCl sensor

- Part of the Distal Convoluted Tubule

Question 8

How do ß-blockers decrease BP?

Answer 8

Inhibiting ß1-receptors of the JGA

-Decrease Renin release