Hypothalamus/Pituitary Histo

Question 1

What are the cells of the anterior pituitary divided into?

Answer 1

Chromophils and chromophobes.

Question 2

What are the chromophils?

Answer 2

Endocrine cells that take up dyes. Are made up of acidophils and basophils.

Question 3

What are the chromophobes?

Answer 3

Endocrine cells with little affinity for dyes. May be undifferentiated cells or degranulated chromophils.

Question 4

What is the most abundant cell type in the anterior pituitary?

Answer 4

Acidophils.

Question 5

What endocrine cells in the anterior pituitary are acidophils?

Answer 5

The somatotropes and lactotropes.

Question 6

What do somatotropes secrete?

Answer 6

Growth hormone (GH) and somatostatin.

Question 7

What do lactotropes secrete?

Answer 7

Prolactin (PRL).

Question 8

What endocrine cells in the anterior pituitary are basophils?

Answer 8

Thyrotropes, gonadotropes, and corticotropes.

Question 9

What do thyrotropes secrete?

Answer 9

TSH

Question 10

What do gonadotropes secrete?

Answer 10

FSH and LH

Question 11

What do corticotropes secrete?

Answer 11

ACTH

Question 12

Where are basophils most concentrated?

Answer 12

In the pars intermedia (between the anterior and posterior pituitary) and the pars tuberalis.

Question 13

What percentage of anterior pituitary cells do somatotropes constitute?

Answer 13

Somatotropes make up 50% of the cells.

Question 14

What percentage of anterior pituitary cells do lactotropes constitute?

Answer 14

Lactotropes make up 15-20% of the cells.

Question 15

What percentage of anterior pituitary cells do corticotropes constitute?

Answer 15

Corticotropes make up 15-20% of the cells.

Question 16

What percentage of anterior pituitary cells do gonadotropes constitute?

Answer 16

Gonadotropes make up 10% of the cells.

Question 17

What percentage of anterior pituitary cells do thyrotropes constitute?

Answer 17

Thyrotropes make up 5% of the cells.