Hypothalamus-Pituitary (lec 21) Flashcards

1
Q

Anterior Pituitary anatomy?

A

endocrine tissue
no nervous innervation
unique blood supply

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2
Q

Posterior Pituitary anatomy?

A

mostly nerves

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3
Q

Anterior Pituitary fxn?

A

neurocrine-released hypothal hormones ->
local circulation ->
ant pit ->
endocrine release

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4
Q

Posterior Pituitary fxn?

A

neurocrine-released hypothal hormones ->
local circulation ->
post pit vesicles ->
neurocrine release

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5
Q

Posterior Pituitary hormones?

Synth’d?

A

Neuropeptides: ADH, oxytocin

hypoth neuronal cell bodies

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6
Q

Posterior Pituitary hormones stored?

Transported?

A

vesicles

in axons

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7
Q

Posterior Pituitary hormones secreted?

Released?

A

at nerve terminals

into pituitary capillaries

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8
Q

ADH regulates?

Secreted when?

Acts on?

A

plasma osmolarity

↑ plasma osmo or hypovol

kidney

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9
Q

ADH action?

Results in?

A

DCT/CD reab H2O

↑ plasma vol
↓ osmo
↓ urine output

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10
Q

Oxytocin action?

Results in?

A

cholinergic synapse d/c oxy from post pituitary

contracts milk ducts myoepith cells -> milk letdown

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