Electrolytes

Question 0

Vasopressin

• alternative name
• where produced?
• released from where?
• target?

Answer 0

Antidiuretic hormone

Produced in hypothalamus
Released from posterior pituitary
Principal cells of renal collecting ducts

Question 1

What is vasopressin’s mechanism of action?

Answer 1

Binds with V2 receptors on basolateral membrane

Activates G protein cascade
Inserts aquaporin 2
Increases water resorption
Urine becomes more concentrated