Posterior Pituitary

Question 1

ADH (vasopressin)

Answer 1

Released in response to increased sodium levels.
Activated vasopressin receptors and increases permeability of renal distal tubules creating water reabsorption Decreases urine, smooth muscle contraction, platelet aggregation, raised factor VIII levels (used in haemorrhage management) increased release of ACTH and hydrocortisone

Released in response to hyper osmolality and suppressed with hypo osmolality (monitored by osmoreceptors in hypothalamus)

Question 2

Oxytocin

Answer 2

Contracts smooth muscle in reproductive organs

Induces milk ejection

Carbetocin- used for postpartum uterine contraction