Antidiuretic hormone

Question 1

Antidiuretic hormone

Answer 1

• Water retention and increase in reabsorbtion by the kidney

* Alcohol reduces ADH secretion

Question 2

Mech of ADH release

Answer 2

1. Decreased blood volume
2. Osmoreceptors in neurons in hypothalamus stimulated
3. Activate neurosecretory axon release of ADH

Question 3

Effect of ADH on organs

Answer 3

1. Kidneys - respond by retaining more water which decreases urine output
2. Sweat glands inhibited - lowers loss of water by perspiration
3. Smooth muscles of arterioles - contract in response, constrict lumen and increase bp

Question 4

Inhibition of ADH release

Answer 4

1. High blood volume
2. Osmoreceptors detect this
3. Inhibition of osmoreceptors reduces ADH secretion