Endocrine histology

Question 1

Describe the mechanism of the endocrine system

Answer 1

Secretes into bloodstream to reach target cells which may be distant from secreting cells

Question 2

Describe the mechanisms of the exocrine system

Answer 2

Secrete via duct on an epithelial surface

Question 3

Describe apocrine secretion

Answer 3

Membrane bound vesicles fuse with apical cell membrane, extrusion of secretion by exocytosis
e.g. milk

Question 4

Describe merocrine secretion

Answer 4

secretion released within fragments of apical cells
e.g., pancreas

Question 5

Describe holocrine secretion

Answer 5

intracellular secretion released during apoptosis
e.g., sebum

Question 6

Label the pituitary gland

Answer 6

1 - pars distalis
2 - pars intermedia
3 - pars nervosa

Question 7

What are the acidophils and basophiles in the pit gland?

Answer 7

Acidophils:
- somatotrophs
- mammotrophs
Basophils:
- corticotrophs

Question 8

Label the pit gland

Answer 8

Question 9

Label the adrenal gland

Answer 9

Question 10

what adrenal gland pathology is present here?

Answer 10

Hyperplasia due to hyperadrenocorticism

Question 11

name the islet cells and secretions of the pancreas

Answer 11

alpha cells - glucagon
Beta cells - insulin
delta cells - somatostatin
F-cells - pancreatic polypeptide