2nd sem unit test: Hormone feedback

Question 1

what is a peptide hormone?
A. cortisol
B. Aldosterone 
C. TSH
D. Vit D3

Answer 1

TSH
[protein in structure]

The rest are steroids.

Question 2

The amount of hormones DOES NOT depend on the _______

Answer 2

effectiveness of post-receptor mechanisms
[depends on the ff.: ]
> amount of hormone bound to carrier protein-regulated amount of circulating free hormone
> density of receptors fort he hormone
> rate of clearance hormone from the kidney or liver

Question 3

A patient with androgen insensitivity looks female because of:

Answer 3

absence of receptors leading to non-response to endocrine stimulus

Question 4

Which hormone exhibits a positive feedback apart from the others?
oxytocin
testosterone 
thyroxine
vasopressin

Answer 4

oxytocin - only 1 that exerts true positive feedback control

Question 5

The target hormone is a non-endocrine cell

Answer 5

GH - ang target niya ay somatic cells -> hormone produced

Question 6

Which hypothalamic hormones stimulate the release of prolactin?

Answer 6

VIP (vasoactive intestinal peptide)

Question 7

The normal levels of prolactin cause:

Answer 7

expression of milk protein gene

Question 8

Which hormone is regulated by short negative feedback loop?

Answer 8

Growth hormone
[ang may long negative feedback loop: ]
thyroid h.
testosterone 
oxytocin

Question 9

Decreased linear growth may be due to:

Answer 9

decreased receptor activity for insulin growth hormone like factors
increased somatomedin concentration
increased GHIH release
[Lahat to tama kasi mag lead siya sa decreased release of GH from anterior pituitary]

Question 10

The paraventricular nuclei release ALL of the ff.:

EXCEPT

Answer 10

DOPAMINE - released by the tuberoinfundibular neurons 
[Other answers: ]
Vasopressin 
Thyroid releasing hormone 
Oxytocin