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Endocrinology > pituitary gland > Flashcards

pituitary gland Flashcards

1
Q

what type of hormones are released from hypothalamus?

A

neurohormones - bc hypothalamus is made up of neural tissue

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2
Q

name of pituitary stalk

A

infundibulum

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3
Q

location of pituitary

A

pocket in spheroid bone - sella turcica

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4
Q

2 lobes of pituitary

A

anterior and posterior

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5
Q

how do hormones get from hypothalamus to ant pituitary?

A

via portal system

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6
Q

what cells are found in the post pituitary?

A

collection of axons - cell bodies are in hypothalamus

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7
Q

what is MSH and where is it produced?

A

melanocyte stimulating hormone - produced in the pars intermedia

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8
Q

which lobe is larger (2/3) and glandular?

A

anterior

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9
Q

what type of cells does the anterior pit originate from?

A

epithelial origin

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10
Q

what type of cells does the posterior pit originate from?

A

neural tissue origin

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11
Q

what is a tropic hormone?

A

governs the release of another hormone

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12
Q

what is a non-tropic hormone?

A

hormone with no intermediate hormones involved

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13
Q

tropic and non-tropic are what type of hormones?

A

hypothalamic

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14
Q

where do tropic hormones travel to?

A

from hypothalamus to ant pituitary via axons of hypothalamic neurons

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15
Q

where do non-tropic hormones travel to?

A

from hypothalamus to post pituitary

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16
Q

how is the hypothalamus connected to the post pituitary?

A

via axons which project down the infundibulum

17
Q

hormones released posterior pituitary?

A

vasopressin - maintains water balance

oxytocin - stimulates uterine contraction and lactation

18
Q

role of magnocellular neurons?

A

in post. pituitary, synthesises ADH and oxytocin

19
Q

which type of hormones are hypothalamic hormones?

A

all peptides - except dopamine (AMINE)

20
Q

5 hypothalamic releasing hormones? (TROPIC)

A 
TRH
CRH
GHRH
GnRH
PRH
21
Q

2 hypothalamic inhibiting hormones? (TROPIC)

A

GHIH

PIH

22
Q

what is the hypothalamus-hypophyseal portal system?

A

network of vessels which transfer tropic hormone from hypothalamus to anterior pituitary

23
Q

5 anterior pituitary hormones which are tropic?

A 
FSH 
LH
GH
ACTH
TSH
24
Q

1 anterior pituitary hormone - non-tropic?

A

Prolactin

25
Q

what works as -ve feedback loop in anterior pituitary?

A

hormones themselves

26
Q

describe 1y endocrine disorder?

A

defect in endocrine gland

most common

27
Q

describe 2y endocrine disorder?

A

defect in ant pituitary as there is too much/little tropic hormone

28
Q

describe 3y endocrine disorder?

A

defects of hypothalamus

Endocrinology (21 decks)

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