Wk1 Intro to Endo Flashcards Preview

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Flashcards in Wk1 Intro to Endo Deck (10):
1

Hormones released by posterior pituitary:

ADH

Oxytocin

2

4 hypothalamic "releasing" hormones that act on the anterior pituitary:

TRH (thyroid releasing hormone)

CRH (corticotropin releasing hormone)

GHRH (growth hormone releasing hormone)

GnRH (gonadotropin releasing hormone)

3

2 hypothalamic "inhibitory" hormones that act on anterior pituitary:

somatostatin (GHIH)

Dopamine

4

Relative speed of anterior vs posterior pituitary hormone effects:

posterior: fast, ADH/oxytocin --> target cells

anterior: slow, pituitary hormones are still a middle man for final desired effect

5

Most common regulator of hormone secretion:

negative feedback

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

6

Review slides

22-29

7

Purpose of "pulsatile" secretion of hypothalamic and pituitary hormones:

prevents desensitization of downstream receptors

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

8

Steroid hormones mediate physiological response via?

transcription

9

Peptide hormones mediate physiological response via?

secondary messenger systems

10

Influence on hypothalamic hormone secretion?

circadian rhythm