Pituitary Histo

Question 1

Which section of pituitary is derived from neuroectoderm

• pars nervosa
• pars tuberalis
• pars distalis
• pars intermedia

Answer 1

pars nervosa is derived from neuroectoderm

Question 2

Pars tuberalis, distalis, and intermedia are derived from

Answer 2

Rathkie’s pouch

from oral ectoderm

Question 3

Embryology of pituitary

Answer 3

posterior derived from neuroectoderm projections
from projection of hypothalamus
anterior derived from oral ectoderm (Rathke’s pouch)
breaks of oral piece, bone grows beneath

Question 4

Blood supply to the pituitary is via what

Answer 4

hypophyseal portal system

Question 5

The answer is probably pars _________

Answer 5

distalis

Question 6

Somatotrope hormones

Answer 6

GH and STH (somatotropin)

Question 7

Mammotropes

Answer 7

prolactin (pregnancy and lactation)

Question 8

Rathke cysts are seen in

Answer 8

pars intermedia

Question 9

Pars intermedia contains this structure

Answer 9

Rathke cysts

lined w/ cuboidal epithelium

Question 10

Rathke cysts are lined with

Answer 10

cuboidal epithelium

filled w/ colloid

Question 11

Pars nervosa contains this very important connection

Answer 11

hypothalamic-hypophyseal tract

Question 12

Pituicytes

Answer 12

in pars nervosa
support for cells of axons
specialized neuroglial cells

Question 13

Support cells for axons in post pituitary

Answer 13

pituicytes

Question 14

Which part of the ant pituitary secretes the most hormones?

Answer 14

pars distalis
contains
-acidophils w/ somatotropes (GH and STH) and mammotropes (prolactin)
-basotrophils (thyrotropes, gonadotropes, corticotropes)

Question 15

Acidophils

• found where
• secrete what

Answer 15

found in anterior pituitary
secrete somatotropes:
-GH
-STH (somatotropin)
and mammotropes/lactotropes:
-prolactin

Question 16

Basophils

• found where
• secrete what

Answer 16

found in anterior pituitary
secrete:
-thyrotropes
-gonadotropes
-corticotropes