Monday - Pituitary Histology - aubie aubie aubie Flashcards Preview

Josh Endo week 1 > Monday - Pituitary Histology - aubie aubie aubie > Flashcards

Flashcards in Monday - Pituitary Histology - aubie aubie aubie Deck (12):
1

Pars tuberalis
Pars nervosa
Pars distalis
Pars intermedia

what do they come from?

All from oral ectoderm except Pars nervosa from neuroectroderm (nervosa - neuro)

2

tell me about where these things are:
Pars tuberalis
Pars nervosa
Pars distalis
Pars intermedia

Pars tuberalis - around the infundibulum
Pars nervosa - it's the posterior pituitary
Pars distalis - largest part of anterior
Pars intermedia - near the nervosa. kinda the border of anterior and posterior

3

two components of hypophysis and where they are from:

Adenohypophysis - oral ectoderm (anterior)

Neurophyppophysis - neural ectoderm (posterior), includes infundibulum

4

Two major cell types in the pars distalis

chomophils and chomophobes (degranulated phils)

5

types of acidophil chromophils
what do they secrete?

Somoatotrops - GH (also called STH for somoatotropin hormone)
Mammotropes - Prolactin
- increase in pregnancy

6

types of basophil chomophils
what do they secrete?

Thyrotropes - TSH

Gonadotroptes (largest) - FSH, LH/ICSH

Corticotropes - ACTH, MSH (melanocyte stimulating)

7

Where do you find remnants of Rathke's pouch?

Called Rathke's Cysts in the Pars intermedia.
cuboidal cells and colloid are present

8

Where are the cell bodies of nerves in pars nervosa?

Supra optic and paraventricular nuclei of hypothalamus

9

supporting nuroglia cells in the pars nervosa are called what?

Pituicytes

10

There are acidophils, basophils and chromophobes in the pars distalis. How do you tell them apart?

Acidophils are light red/pink
Basiphils are darker/purple
Chomophobes, cytoplasm doesn't stain much but nucleus does.

11

Type of capillary in the pars distalis:

sinusoidal

12

Pouch of stuff between the pars distalis and nervosa

It's a Rathke's pouch, full of colloid. This is the pars intermedia.