Pituitary Hormones

Question 1

ACTH

Answer 1

• target adrenal cortex
• stimulates secretion of glucocorticoids
• stimulated by CRH, inhibited by glucocorticoids

Question 2

MSH

Answer 2

• target skin/hair/feathers (called melanocyte stimulating hormone)
• stimulates secretion of melanin
• stimulate by CRH, inhibited by oxytocin

Question 3

TSH

Answer 3

• target thyroid gland
• stimulates secretion of thyroid hormones
• stimulated by TRH, inhibited by thyroid hormones

Question 4

GH

Answer 4

• target most tissues
• promotes protein synthesis and growth; lipolysis and increased blood glucose
• inhibited by somatostatin (GHIH), stimulated by GHRH

Question 5

FSH/LH

Answer 5

• target gonads
• gamete production, sex hormone secretion
• stimulated by GnRH, inhibited by sex steroids

Question 6

Prolactin

Answer 6

• target mammary gland
• promotes milk production
• stimulated by PRH and estrogen, inhibited by PIH (dopamine)

Question 7

ADH

Answer 7

• target kidney
• promotes water retention
• stimulated or inhibited by blood volume/osmoreceptors

Question 8

Oxytocin

Answer 8

• target mammary gland, uterus
• stimulates contraction of uterus during labour, contraction of mammary gland
• stimulated by various receptors