Histology Of Thyroid Gland

Question 1

thyroid gland

-made of—— and—— which are made of thyroid——

Answer 1

Lobes

lobules

follicles

Question 2

FOLLICLES

• made up of ——which are——
• follicular cells are ——-cells that have their free surface(apical ) thrown into___

Answer 2

colloid cavities

spaces surrounded by follicular cells

simple cuboidal ; folds called microvilli

Question 3

follicular cells are arranged in a—— pattern

Answer 3

circular

Question 4

follicular cells secrete—— and——

Answer 4

T3

T4

Question 5

follicular cells do not have secretory granules in their cytoplasm
T/F

Answer 5

F

Question 6

blood capillaries are found—— to——

-their secretions also enter the blood through the—— because thyroid gland is an—— gland so it has——

Answer 6

around the follicles

bring the raw materials needed for them to produce their stuff

capillaries

endocrine; no duct

Question 7

parafollicular cells

• aka—- cells
• are found——
• secrete——
• are—— in shape with—- nucleus
• sometimes seen as—- cells but mostly found as——

Answer 7

C

between the follicles

calcitonin

polyhedral; oval

single; clusters

Question 8

COLLOID CAVITY

• filled with a —-called—— which made up of a—— Called——, a——(—-,——and——)
• it is secreted by the—— and deposited within the colloid cavity

Answer 8

thick substance ; colloid

pro-hormone; thyroglobulin

glycoprotein

iodine, protein, glycogen

follicular cells

Question 9

——– serves as a reservoir for thyroglobulin

Answer 9

Colloid in colloid cavity

Question 10

SECRETION AND RELEASE OF T3,T4 occurs in —- phases

List them

Answer 10

2phase

Colloid synthesis mode
Colloid degradation mode

Question 11

colloid synthesis mode

• producing—— from—-,——, and— and emptying it into the——
• this happens till——- is——

Answer 11

thyroglobulin

iodine; glycogen; protein

colloid Cavity

colloid Cavity; filled up

Question 12

Colloid degradation mode
-once filled, the cells surrounding the follicle are activated by the——- (—-) produced by—— gland to—- into——(T4;—%) and—— (T3;——%)

Answer 12

thyroid stimulating hormone; TSH

pituitary

degrade thyroglobulin

thyroxine; 80

triiodothyronine; 20

Question 13

when colloid cavity is filled and the follicular cells are just squamous/flat, it means the follicle is—— and this info can be used to make some diagnosis

Answer 13

inactive

Question 14

MICROVASCULATURE OF THYROID GLAND
-from major arteries to—— to—- to—- arteries (——branch)

-from——- to——- to——— to ——-to thyroid veins

Answer 14

interlobular; intralobular; follicular; finest

follicular capillaries; follicular veins; intralobular veins; interlobular veins