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Flashcards in pit gland physio Deck (40)
1

what types of loops are included in negative feedback (3)?

1. ultra short loop
2. short loop
3. long loop

2

give an example of a positive feedback loop?

b4 ovulation; estradiol effect on HPA

3

which hypothalamic center is a satiety center?

ventromedial nucleus (VMN)

4

lesions in the ______nucleus result in obesity

ventromedial

5

the _____nucleus has a role in control of appetitie

arcuate nucleus

6

which hypothalamic center is a hunger center?

lateral hypothalalmus

7

which hypothalamic center is a Thermoregulation- cooling center, and a thirst center ?

anterior hypothalamus

8

which hypothalamic center is a thermoregulation - heating center

posterior hypothalamus

9

median eminence is part of the ?

hypothalamus

10

the hypothalamus is located in the ___Ventricle and is part of the ____ of the brain

3rd; diencephalon

11

what are the 3 components of the adenohypophysis?

1. pars tuberalis
2. pars distalis
3. pars intermedia

12

The _______ is the first part of the portal circulation between the hypothalamus and the anterior pituitary

primary plexus

13

The area of the hypothalamus where the portal vessels arise?.

median eminence

14

which lobe has the neural cells?

posterior pit

15

The posterior pituitary is connected to the hypothalamus by the_____?

hypothalamohypophysial tract

16

what does the hypothalamohypophysial tract consist of (2)?

composed of the axons from the supraoptic and paraventricular nuclei

17

prolactin is released by which cells (2)?

lactotroph + mammosomatotroph

18

GH is released by _____ + _________

mammosomatotroph + somatotroph

19

FSH is released by ______

gonadotroph

20

gonadotrophs release which hormones (2)

LH + FSH

21

mammosomatrophs release which hormones?

prolactin + GH

22

what cell types are most common in human ant pit?

somatotrope

23

Which three pituitary hormones have a common α subunit but different β subunits which determine hormone specificity?

TSH, LH, FSH, (+hcG)

24

what are the tropic hormones(4)?

ACTH, FSH, LH, TSH

25

The fenestrated capillaries of the primary plexus join to form the ____________ which carry blood to the capillaries of the anterior pituitary.

hypophysial vessels

26

when is the maximal secretion of GH?

during deep sleep (stage 3-4)

27

there is a ____ in GH release with aging

decrease

28

prolactin makes the machinery for milk or makes you release milk?

prolactin makes the machinery for milk

29

does excessive prolactin release lead to infertility or super fertility?

infertility

30

prolactin _____ovulation and ____spermatogenesis by _____GnRH

inhibits, inhibits, inhibits

31

what is most important in controlling plasma vasopressin levels?

osmolality

32

neurogenic (hypothalamic or central) diabetes insipidus is due to what issues (2)

1. issue with hypothalamus
2. issue w/ connection b/w hypothalamus & post pit

33

Patients on _______ can develop acquired diabetes insipidus.

lithium treatments

34

effect of prolactin on GnRH

inhibits

35

where is the main site of IGF synthesis?

liver

36

What is the other name for the insulin-like growth factors

somatomedins

37

relationship b/w GH and IGF?

Growth hormone might exert much of its effects through the action of IGF

38

what is Panhypopituitarism?

inadequate production of pituitary hormones due to (1) congenital or (2) acquired diseases

39

the result of excessive growth hormone in children

gigantism

40

the result of excessive growth hormone in adults

acromegaly