Epithelia

Question 0

What are the functions of simple squamous epithelia?

Answer 0

Lubrication, gaseous exchange, barriers, active transport (pinocytosis)

Question 1

Where are simple squamous epithelia found?

Answer 1

Endothelium, mesothelium, respiratory tract, Bowman’s capsule, loop of Henle, inner and middle ear

Question 2

Where are simple cuboidal epithelia found?

Answer 2

Thyroid follicles, small ducts of exocrine glands, kidney tubules, surface of ovaries (germinal epithelium)

Question 3

What are the functions of simple cuboidal epithelia?

Answer 3

Absorption and conduit (exocrine glands), absorption and secretion (kidney tubules), barrier (ovary), hormone synthesis, storage and mobilisation (thyroid)

Question 4

Where are simple columnar epithelia located?

Answer 4

Crypts of Lieberkuhn, gall bladder and fallopian tubes (both ciliated and non ciliated)

Question 5

Where are pseudostratified epithelia located?

Answer 5

Lining of nasal cavity, trachea & bronchus, epidiymis & ductus deferens, auditory tube, lacrimal sac, large excretory ducts

Question 6

What are the functions of pseudostratified epithelia?

Answer 6

Secretion & conduit (respiratory tract, ductus deferens), absorption (epididymis), mucus secretion (respiratory tract), particle trapping & removal (respiratory tract)

Question 7

Where are the simple columnar epithelia with microvilli located?

Answer 7

Junctional complexes

Question 8

What are the functions of simple columnar epithelia with microvilli?

Answer 8

Absorption (small intestine, colon, gallbladder), secretion (stomach lining, gastric glands, small intestine & colon), transport (oviduct)

Question 9

Where is the stratified squamous epithelium located?

Answer 9

Oral cavity, oesophagus, larynx, vagina, part of anal canal, surface of cornea, inner surface of eyelid

Question 10

What are the functions of stratified squamous epithelia?

Answer 10

Protection against abrasion, reduces water loss but remains moist

Question 11

Where is keratinised stratified squamous epithelia located?

Answer 11

Surface of skin, limited distribution in oral cavity

Question 12

What are the functions of keratinised stratified squamous epithelia?

Answer 12

Protection against abrasion and physical trauma, prevents water loss, prevents ingress of microbes, shields against UV light damage

Question 13

What are the locations of transitional epithelia?

Answer 13

Renal calyces, ureter, bladder and urethra

Question 14

What are the functions of transitional epithelia?

Answer 14

Distensibility, protection of underlying tissue from toxic chemicals