epithelial tissues

Question 1

functions of epithelial tissue? (6)

Answer 1

protection, control permeability, absorption, secretion, provide sensation

Question 2

what are the characteristics of epithelial tissue?

Answer 2

cells held tightly together=form barriers, special junctions:
tight junction, desmosomes, and gap junctions

Question 3

cells have?

Answer 3

polarity

Question 4

what does the basal surface sit on?

Answer 4

basement membrane composed of basal lamina (glycoprotein layer secreted by epithelial cells)

Question 5

function and location of simple squamous?

Answer 5

reduces distance and time required for diffusion: lining of lungs, alveoli capillaries, smooth lining for heart, blood vessels

Question 6

function and location of simple cuboidal?

Answer 6

secretes/absorbs in ducts and tubes: kidney tubules, pancreatic duct, thyroid gland, salivary gland

Question 7

function and location of simple columnar ?

Answer 7

secretes/absorbs in tubes and across large surfaces: stomach intestines

Question 8

function and location of stratified squamous?

Answer 8

protect against abrasion, chemicals, pathogens: skin, lining of throat, esophagus, rectum, anus, vagina

Question 9

function and location of stratified cuboidal?

Answer 9

protects and secretes: ducts of sweat glands and mammary gland

Question 10

function and location of pseudo stratified columnar?

Answer 10

protects, secretes, moves material along passageway: lines nasal cavity, trachea, bronchi, bronchioles

Question 11

function and location of transitional

Answer 11

protects while stretching and recoiling: lines bladder and uterus

Question 12

what are the two types of glands epithelial tissue form?

Answer 12

exocrine and endocrine

Question 13

what do goblet cells secrete

Answer 13

mucin

Question 14

what two parts do exocrine glands consist of?

Answer 14

secretary unit (tubular or alveolar) and duct (simple or compound)

Question 15

what are the 3 types of exocrine glands?

Answer 15

merocrine, holocrine and apocrine

Question 16

function and location of merocrine gland?

Answer 16

most exocrine gland, secrete products from vesicles by exocytosis
ex. pancreas, salivary gland, sweat, goblet

Question 17

function and location of holocrine gland?

Answer 17

secretion accumulates and whole cell bursts releasing secretion
ex. sebaceous gland

Question 18

function and location of apocrine gland?

Answer 18

secretory product accumulates at apex of cell and apex breaks off
ex. mammary glands

Question 19

what are the function of endocrine glands?

Answer 19

secrete hormones, most formed from epithelial tissue, ductless
ex. thyroid, adrenal, ovary, testes