The secretion of which one is controlled by hypothalamo-hypophyseal feedback?
Anonymous Quiz
71%
thyroxin.
26%
aldosterone
2%
insulin
2%
calcitonin
Concerning the pars nervosa, it:
Anonymous Quiz
7%
can appear as brain sand.
12%
contains nerve cells.
80%
has axons of hypothalamo-hypophyseal tract.
0%
has portal circulation.
Pituicytes are found in:
Anonymous Quiz
8%
pars distalis.
2%
pars intermedia.
88%
pars nervosa
2%
pars tuberalis.
The posterior pituitary:
Anonymous Quiz
77%
contains pituicytes, herring bodies and axons.
2%
has a portal blood supply
4%
contains nerve cells.
17%
form oxytocin & vasopressin.
16. Pituicytes:
Anonymous Quiz
10%
a. produce vasopressin.
2%
b. produce prolactin.
82%
c. a type of glial cell.
6%
d. found in pars distalis.
17. The hypothalamus is connected with pars nervosa via ........
Anonymous Quiz
96%
a. hypothalamo-hypophyseal tract.
2%
b. adenohypophysis.
2%
c. pars tuberalis
0%
d. adrenal medulla.
18. Oxytocin is synthesized in:
Anonymous Quiz
5%
a. pars nervosa.
50%
c. hypothalamus
0%
b. pars intermedia.
45%
d. supraoptic & paraverticular nuclei.
19. The releasing and inhibiting hormones are transported to pars distalis via:
Anonymous Quiz
16%
a. superior hypophyseal arteries.
74%
b. portal vessels.
5%
c. inferior hypophyseal vein.
5%
d. inferior hypophyseal artery.
20. Vasopressin & oxytocin are synthesized in the:
Anonymous Quiz
2%
a. pars distalis
4%
b. pars intermedia.
9%
c. pars nervosa.
84%
d. supraoptic & paraverticular nuclei.
22. Which of the following cells have no granules:
Anonymous Quiz
6%
a. acidophils of pars distalis.
57%
c. cells of adrenal cortex.
6%
b. basophils of pars distalis.
31%
d. chromaffin cells.
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23. The main ultrastructural feature of the zona fasciculata cells is the
presence of:
presence of:
Anonymous Quiz
74%
a. smooth endoplasmic reticulum.
13%
b. rough endoplasmic reticulum.
3%
c. few mitochondria.
10%
d. long cilia.
25. The following statement is true about thyroid follicles:
Anonymous Quiz
3%
a. Lined with squamous cells.
13%
b. Form T3, T4 & TSH.
72%
c. Surrounded by fenestrated capillaries.
13%
d. Lined with parafollicular cells which store calcitonin in the colloid.
26. The adrenal cortex secretes:
Anonymous Quiz
0%
a. calcitonin.
79%
b. mineralocorticoids.
10%
c. catecholamines.
12%
d. ACTH.
27. The cells of the adrenal cortex:
Anonymous Quiz
7%
a. are ectodermal.
10%
b. are rich in rough endoplasmic reticulum.
78%
c. produce steroid hormones.
5%
d. produce noradrenaline.