Pituitary Histo- Shaw

Question 1

What part of the pituitary gland is derived from neuroectoderm?

Answer 1

Posterior Pituitary

Question 2

What part of the pituitary gland is derived from oropharynx ectoderm?

Answer 2

Anterior Pituitary

Question 3

Rathke’s Pouch is from what embryonic derivative?

Answer 3

Oropharynx Ectoderm

Question 4

What does Rathke’s Pouch become?

Answer 4

Anterior pituitary

Question 5

What are the three components of the anterior pituitary?

Answer 5

Pars tuberalis
Pars distalis
Pars intermedia

Question 6

What is the one component of the posterior pituitary?

Answer 6

Pars nervosa

Question 7

Does the anterior pituitary have a direct arterial blood supply?

Answer 7

NOOOOOO!

Question 8

Which two cell types in the anterior lobe are acidophils? What do they look like on H&E?

Answer 8

Look eosinophilic!

Cells:
Somatotropes
Mammotropes

Question 9

What do somatotropes produces?

Answer 9

Growth Hormone

Question 10

What do mammotropes produces?

Answer 10

Prolactin

Question 11

Which cell types in the anterior lobe are basophils?

Answer 11

Thyrotropes
Gonadotropes
Corticotropes

Question 12

What do thyrotropes produce?

Answer 12

TSH

Question 13

What do Gonadotropes produce?

Answer 13

FSH
LH
ISCH (interstitial stimulating hormone in males)

Question 14

What do corticotropes produce?

Answer 14

ACTH

Melanocyte-stimulating hormone (MSH)

Question 15

What is a distinguishing feature of the pars intermedia?

Answer 15

Rathke’s Cysts = remnants of Rathke’s pouch willed with colloid

Question 16

What are pituicytes?

Answer 16

“supportive” cells found through out posterior lobe

May be specialized neuroglial cells

Question 17

What are chromophobes?

Answer 17

“stain fearing”
Show scant cytoplasmic staining, with obvious nucleus

May represent degranulated (exhausted) acidophils or basophils