1. Gigantism is due to oversecretion of growth hormone before puberty. 2. Somatostatin is released by hypothalamic neurons and inhibits the release of growth hormone from the adenohypophysis. 3. Oxytocin causes secretion of milk by the mammary glands and uterine contractions.

1. MCQs

2. 1-Gigantism is:
A-associated with hyperfunction of the testes
B-due to oversecretion of the growth hormone
before puberty
C-due to thyroid hypofunction after puberty
D-the normal result of insulin intake

3. 2. Somatostatin
A-increases the formation of somatomedins by
the liver
B-increases the release of growth hormone from
the adenohypophysis
C-is released by hypothalamic neurons
D-reaches the adenohypophysis via a
hypothalamic-hypophyseal nervous tract

4. 3-The oxytocin hormone causes:
A-secretion of milk by the mammary glands
B-inhibition of ADH secretion
C-skeletal muscle contraction
D-uterine contractions

5. 4-Acromegaly is:
A-due to a basophil adenoma in the
adenohypophysis during infancy.
B-the result of inability of the liver to produce
somatomedin.
C-accompanied by overgrowth of long bones and
increased sensitivity to insulin.
D-usuaslly accompanied by depressed sexual
functions and signs of increased intracranial
tension.

6. 5-All the following stimuli increase growth
hormone secretion except:
A-certain amino acids
B-stressful stimuli
C-deep sleep
D-hyperglycemia

7. Put (true) or (false).

8. 1. Receptors for steroid hormones and thyroid
hormones are present on the cell membrane. ( )
2. Growth hormone increases the protein synthesis by
increasing the amino acid transport across cell
membranes. ( )
3. One of the actions of somatostatin that it
stimulates gastrin secretion as well as most other
GIT activities. ( )

9. 4. The adenohypophysis secretes a hormone that
stimulates milk secretion from mammary glands.
( )
5. hypothalamo-hypophyseal portal system is a major
pathway for control of ADH and oxytocin secretion.
( )

10. 1-Giantism is:
A-associated with hyperfunction of the testes
B-due to oversecretion of the growth hormone
before puberty
C-due to thyroid hypofunction after puberty
D-the normal result of insulin intake

11. 2. Somatostatin
A-increases the formation of somatomedins by
the liver
B-increases the release of growth hormone from
the adenohypophysis
C-is released by hypothalamic neurons
D-reaches the adenohypophysis via a
hypothalamic-hypophyseal nervous tract

12. 3-The oxytocin hormone causes:
A-secretion of milk by the mammary glands
B-inhibition of ADH secretion
C-skeletal muscle contraction
D-uterine contractions

13. 4-Acromegaly is:
A-due to a basophil adenoma in the
adenohypophysis during infancy
B-the result of inability of the liver to produce
somatomedin
C-accompanied by overgrowth of long bones and
increased sensitivity to insulin
D-ususlly accompanied by depressed sexual
functions and signs of increased intracranial
tension

14. 5-All the following stimuli increase growth
hormone secretion except:
A-certain amino acids
B-stressful stimuli
C-deep sleep
D-hyperglycemia

15. 1. Receptors for steroid hormones and thyroid
hormones are present on the cell membrane. ( F )
(for steroid hormones present in cytoplasm,while for
thyroid hormones present in the nucleus.)
2. Growth hormone increases the protein synthesis by
increasing the amino acid transport across cell
membranes. ( T )
3. One of the actions of somatostatin that it stimulates
gastrin secretion as well as most other GIT activities.
( F )
(It inhibits)

16. 4. The adenohypophysis secretes a hormone that
stimulates milk secretion from mammary glands.
( T )
5. hypothalamo-hypophyseal portal system is a major
pathway for control of ADH and oxytocin secretion.
( F )
(hypothalamo-hypophyseal tract)