Pituitary Gland Flashcards
3 parts of pituitary gland and their region
Pars nervosa (central region) posterior
Pars intermedia (enwrapping the pars nervosa)
Pars anterior (distalis) the major portion of the section
What is within the pars distalis
Sinusoids containing erythrocytes, chromaphils (acidophils and basophils), chromophobes
What are chromophils
Cells possessing an affinity for dye
What color are acidophils
Orange cytoplasm
Cells with red or blue cytoplasmic granules
Basophils
What are chromophobes characteristics
Small, round cells with little cytoplasm
Lack an affinity for dye
No granules
Nucleus-to-cytoplasm ratio is high and present groups of tightly packed nuclei!
What is derived from acidophils
Growth hormone and prolactin
What is derived from basophils
FSH, LH, TSH,
Why do basophils stain red
They are PAS positive because of the large amount of glycoprotein
What do chromophobes produce
ACTH, corticotropin
Is pars distalis vascular
Yes
What is contained in the pars nervosa
Numerous capillaries
Pale areas composed of unmyelinated axons from nerve cells of Supraoptic and paraventricular nuclei of the hypothalamus
Vesicles (follicles) containing colloid can be found where
Pars intermedia
Where is rathke’s pouch
Cleft between the pars distalis and pars intermedia
There are 2 origins of the pituitary gland. What are they and when they converge, what do they form
Roof of the mouth and floor of the diencephalon
They form the rathke’s pouch when they come together
