Adrenal Gland Histology Flashcards Preview

HRM - Anatomy/Embryology/Histology > Adrenal Gland Histology > Flashcards

Flashcards in Adrenal Gland Histology Deck (23):
1

What embryological tissue gives rise to the adrenal cortex?

Mesoderm

2

What embryological tissue gives rise to the adrenal medulla?

Neural crest cells

3

What type of nerve fibers innervate the adrenal medullary cells?

Preganglionic sympathetic

4

What are the three zones to the adrenal cortex?

Zona glomerulosa
Zona fasiculata
Zona reticularis

5

What do cells in the zona glomerulosa make?

Aldosterone!
Some corticosteroids

6

What are cells in the zona fasiculata called?

spongiocytes

7

What cellular characteristics do spongiocytes have?

Abundand lipid droplets
Abundant smooth ER
Mitochondria with tubular cristae

8

What do zona fasiculata cells (spongiocytes) make?

Cortisol or hydrocortisone
Some androgens and estrogens

9

What do cells in the zona reticularis make?

Sex hormones (Androgens), some glucocorticoids

10

What hormones stimulate the zona glomerulosa?

Angiotensin II
Corticotropin

11

What hormones stimulate the zona fasiculata and zona reticularis?

ACTH

12

In which zone can you see downward moving fenestrated capillaries?

Zona fasicularis

13

What are the cells called in the adrenal medulla?

Chromaffin cells

14

What cellular characteristics are in chromaffin cells?

Prominent golgi and rough ER
Small secretory granules

15

What is chromogrannin?

ATP with soluble proteins that concentrate Epi or Norepi in secretory granules

16

What do chromaffin cells secrete?

Epinephrine OR Epinephrine

17

What amino acid is a necessary precursor for the synthesis of epinephrine?

Tyrosine

18

What stimulates the release of Epi or Norepi from enterochromaffin cells?

Acetylcholine from preganglionic sympathetic nerves

19

What are chromaffin cells most similar to?

Neurons without axons or dendrites

20

What is a tumor of the adrenal medullary cells called?

Pheochromocytoma

21

What are the three sets of capillaries for the adrenal gland?

Capsular plexus (immediately under capsule)
Cortical sinusoidal vessels
Medullary capillaries

22

What brings glucocorticoids to the venules of the medulla?

First cortical sinusoidal vessels
Then medullary capillaries

23

Where are paraganglia cells and what do they do?

Associated with sympathetic ganglia
Do the same thing as chromaffin cells