histo

Question 1

location of pit

Answer 1

beneath 3rd ventricle
sits in sella turcica

Question 2

emb of pit

Answer 2

pp- downgrowth of hypoth, nervous tissue
ap- upgrowth of roof of primitive oral cavity (rathkes pouch), epithelial tissue

Question 3

ant pit typical arrangement

Answer 3

cord and clumps of epith with fenest capill network
h is stored as secretory granules

Question 4

three cell types in ant pit

Answer 4

chromophobes- weak staining
chromophils - baso or acidophile

Question 5

three cell types in ant pit

Answer 5

chromophobes- weak staining
chromophils - baso or acidophil

acidophil majority of ap
soamtotroph bulk of acidophils

Question 6

mammotrophs

Answer 6

prl (20%)
acidophil

Question 7

somatotrophs

Answer 7

hg (50%)
acidophil

Question 8

gonadotrophs

Answer 8

lh and fsh (5%)
basophil

Question 9

thyrotrophs

Answer 9

tsh (5%)
basophil

Question 10

corticotrophs

Answer 10

acth (20%)
basophil

Question 11

pars intermedia distinguishing feature

Answer 11

clusters of basophilic cells
with small cystic spaces of eosinophilic material in them

Question 12

pituicytes

Answer 12

supporting glial cells in pp

Question 13

herring bodies

Answer 13

distended ends of axon that contain neurosecretory granules in pp

Question 14

2 components of pancreas

Answer 14

exo - acinus
endo - islets of langs

Question 15

islets of l cells

Answer 15

3000 secretory cells that
small pale cyto
beta, alpha, delta

Question 16

beta cells

Answer 16

insulin (60% of islets)
throughout the tissue

Question 17

alpha cells

Answer 17

glucagon (20%)
periph of thr islet tissue

Question 18

delta cells

Answer 18

somatostatin

Question 19

the exo panc appearance

Answer 19

looks like purple blue petals with white centre (the duct)

Question 20

origin of adrenal gland segments

Answer 20

cortex- mesod
medulla - neural crest

Question 21

zones of adrenal gland ext to int

Answer 21

zona glom
zona fasc
zona retic
medulla

Question 22

zona glom secretes

Answer 22

aldos

Question 23

zona fasc and retic secretes

Answer 23

cortisol & androgens

Question 24

medulla secretes

Answer 24

epin & norepin

Question 25

parathyroid cell types

Answer 25

principal cell- parathy h. small pale and round central nuec oxyphil cell- large eosinophilic cyto (degenerative derivatives of principal cells)

Question 26

pineal cells

Answer 26

pnealocytes - slightly basophilic and irreg euchromatic nuclei modified astrocytes