Pit and thyroid

Question 1

location of the pit

Answer 1

lies in the sella turcica

Question 2

what are lat, ant, and post. to pit

Answer 2

lat - cavernous sinouses
ant. - sphenoidal air sinus
post - dorsum sellae

Question 3

where does pit go if enlarged?

Answer 3

up

Question 4

what are 2 main portions of adenohypophysis

Answer 4

1. pars tuberalis

2. pars distalis

Question 5

3 main portions of neurophypophysis

Answer 5

1. infundibulum
2. pars nervosa
3. pars intermedia

Question 6

what 2 areas does the pit dev from?

Answer 6

1. posterior from neuroectoderm of neural tube

2. anterior from floor of stomatodeam called rathkes pouch

Question 7

3 main cell types in neurohypo.

Answer 7

1. capils
2. axons
3. herring bodies

Question 8

2 hormones released by neurohypo

Answer 8

1. oxytocin

2. ADH

Question 9

2 main types of cells in adenohypo

Answer 9

1. chromophobes

2. chromophils

Question 10

2 main types of chromophils

Answer 10

1. acidophils

2. basophils

Question 11

2 main types of acidophils and their secretions

Answer 11

1. somatotropic - somatoropin (growht hormone)

2. prolactin

Question 12

3 main types of basophils and their secretions

Answer 12

1. gonadotropic - FSH (follicle dev) and LH (follicle stim and leydig cells)
2. thyrotropic - TSH - stims thyroid
3. corticotropic - ACTH - stims adrenals

Question 13

path of blood through pit

Answer 13

internal carotid>sup. hypohyseal art.>primary cap. plexus>portal veins>sec. cap. plexus

Question 14

2 main parts of thyroid

Answer 14

1. 2 lobes

2. ithsmus

Question 15

2 main cell types in thyroid

Answer 15

1. spherical follicles

2. connective tissue with caps

Question 16

what happens in active gland

Answer 16

1. taller epithelium

2. smaller follicles

Question 17

what do follicles contain

Answer 17

gel like substance called colloid

Question 18

what happens in presence of TSH

Answer 18

thyroglobulin phagocytosed and fuse with lysosomes, which then excrete T3 and T4 out

Question 19

what are parafollicular cells

Answer 19

pale staining cells in follicular lining that produce calcitonin