Wk1 Intro to Endo

Question 1

Hormones released by posterior pituitary:

Answer 1

ADH

Oxytocin

Question 2

4 hypothalamic “releasing” hormones that act on the anterior pituitary:

Answer 2

TRH (thyroid releasing hormone)

CRH (corticotropin releasing hormone)

GHRH (growth hormone releasing hormone)

GnRH (gonadotropin releasing hormone)

Question 3

2 hypothalamic “inhibitory” hormones that act on anterior pituitary:

Answer 3

somatostatin (GHIH)

Dopamine

Question 4

Relative speed of anterior vs posterior pituitary hormone effects:

Answer 4

posterior: fast, ADH/oxytocin –> target cells
anterior: slow, pituitary hormones are still a middle man for final desired effect

Question 5

Most common regulator of hormone secretion:

Answer 5

negative feedback

Ex: thyroid hormone curtails release of thyroid releasing hormone and thyroid stimulating hormone

Question 6

Review slides

Answer 6

22-29

Question 7

Purpose of “pulsatile” secretion of hypothalamic and pituitary hormones:

Answer 7

prevents desensitization of downstream receptors

**this is how birth control works–constant hormone release desensitizes receptors

Question 8

Steroid hormones mediate physiological response via?

Answer 8

transcription

Question 9

Peptide hormones mediate physiological response via?

Answer 9

secondary messenger systems

Question 10

Influence on hypothalamic hormone secretion?

Answer 10

circadian rhythm