Endocrine Embryology

Question 1

What are the 3 ways the hypothalamus functions?

Answer 1

1. Endocrine by releasing ADH and Oxytocin.
2. Secretes releasing and inhibiting hormones.
3. Adrenal gland effects

Question 2

How does Rathkes pouch form and what is its derivitive?

Answer 2

Ectodermal outpocketing.

Forms anterior pituitary or adenohypophysis.

Question 3

How is the infudibulum formed and what does it make?

Answer 3

Extention of diencephalon.

Forms Posterior pituitary or neurohypophysis, and pituitary stalk.

Question 4

What are herring bodies, and where are they found?

Answer 4

Large bulbs of neurosecretory cells that store products. Found in posterior pituitary.

Question 5

Where are Cromophils and Cromophobe cells located?

Answer 5

Anterior pituitary.

Question 6

What do follicular cells make? what do parafollicular cells make and where do they originate from? Where are these cells located?

Answer 6

Follicular: T3 T4
Para: Calcitonin from untimobranchial body from 4th pouch.

All from thyroid gland.

Question 7

Which pouches do the inferior and superior portion of the parthyroid gland come from?

Answer 7

Superior=4. Inferior=3

Question 8

What germ layer is the adrenal cortex and medulla made from?

Answer 8

Cortex=Mesoderm

Medulla=Ectoderm.

Question 9

How is the pancreas formed? What can happen if it does form properly?

Answer 9

Dorsal and ventral buds form and fuse. Annular Pancreas occurs when they dont fuse.