Lecture 1 - Hypothalamus/Pituitary 1 Flashcards Preview

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Flashcards in Lecture 1 - Hypothalamus/Pituitary 1 Deck (11):
1

Development?

forebrain -> diencephalon -> hypothalamus

2

Blood vessels - anterior pituitary

superior hypophyseal artery -> hypophyseal portal veins -> anterior hypophyseal veins

3

Blood vessels - posterior pituitary?

inferior hypophyseal artery -> capillary plexus of infundibular process -> posterior hypophyseal vein

4

Axons of the posterior pituitary>?

non-myelineated for neurosecretory purposes, cell bodies in the hypothalamus

5

Growth hormone inhibiting hormone pathway?

periventricular nucleus release GHIH which inhibits anterior lobe releasing GH stimulating liver which leads to (decreased) skeletal muscle, cartilage and other tissue growth - IGF-1 positively feedsback

6

Growth hormone releasing hormone pathway?

arcuate nucleus release GHRH stimulating anterior lobe, releasing GH which stimulates liver - IGF-1 negatively feeds back

7

Prolactin?

ilk production - anterior lobe

8

Oxycotin?

milk letdown - posterior lobe

9

Positive feedback of titties?

suckling on mammary gland triggers signal up spinal cord, positively feeding back further release

10

Tubero-infundibular dopamine neurons?

prolactin positively feeds back these neurons increasing DA in median eminence inhibiting prolactin production - placental lactogens inhibit DA

11

Gonad hormones and ovary cells?

LH acts on thecal cells, FSH act on granulosa cells