Chapter2

Question 1

explain the action of FSH on both sexes.

Answer 1

1male: act on sertolie Cs to stimulate spermatogenisis, secretion of inhibin

2Female: acts on granulosa Cs, stimulate follicular development, secretion of Estrogen, progestron

Question 2

explain the action of LH on both sexes.

Answer 2

1_male: acts on Leydig cells, stimulate the secretion of testosterone.
2_Female: acts on Thica cells, stimulate secretion of estrogen, ovulation.

Question 3

when dose LH, FSH hormones increase markly?

Answer 3

puberty

, in women preceding ovulation, after menopause

Question 4

what is the types of MSH and their sources?

Answer 4

a, B, gamma.
a. ACTH.
b, g. B_lipoprotein.

Question 5

what’s the symptoms of dwarfism

Answer 5

facial growth retardation.
thin skin and hair.
dentition is delayed.
mandible and maxilla are small.
voice is pitched.
hypoglycemia (increased insulin sensitivity.

Question 6

What’s the clinical features of acromegaly?

Answer 6

coarsing of facial features&soft tissue
large( mandible, macroglossia, lips, liver,Pancreas, spleen, kidney, thyroid)
swelling of feet and hands,excessive sweating.
sleep apnea,daytime somnlence.
Thoracic kyphosis.
D.M,CHF.

Question 7

Mention the actions of AVP.

Answer 7

Water resorption from distal nephron
vascular constriction(raise BP)
stimulate ACTH,GH

Question 8

What hormone is used in treatment of esophageal varicose?

Answer 8

ADH

Question 9

How do OXT, ADH regulated?

Answer 9

1_By ANS
Acetylcholine (stimulate).
Noradrenaline(inhibit).

2_OXT is stimulated By sexual intercourse pregnancy,delivery,sucking.

3_AVP is regulated by plasma osmolality,Blood volume.

Question 10

what’s the most common disorder of neurohypoghesis?

what’s the cause?

Answer 10

diabetes insipidus.

hypophysectomy, damage in hypothalamic tract