epithelial tissues Flashcards

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1
Q

functions of epithelial tissue? (6)

A

protection, control permeability, absorption, secretion, provide sensation

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2
Q

what are the characteristics of epithelial tissue?

A

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

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3
Q

cells have?

A

polarity

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4
Q

what does the basal surface sit on?

A

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

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5
Q

function and location of simple squamous?

A

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

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6
Q

function and location of simple cuboidal?

A

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

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7
Q

function and location of simple columnar ?

A

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

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8
Q

function and location of stratified squamous?

A

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

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9
Q

function and location of stratified cuboidal?

A

protects and secretes: ducts of sweat glands and mammary gland

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10
Q

function and location of pseudo stratified columnar?

A

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

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11
Q

function and location of transitional

A

protects while stretching and recoiling: lines bladder and uterus

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12
Q

what are the two types of glands epithelial tissue form?

A

exocrine and endocrine

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13
Q

what do goblet cells secrete

A

mucin

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14
Q

what two parts do exocrine glands consist of?

A

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

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15
Q

what are the 3 types of exocrine glands?

A

merocrine, holocrine and apocrine

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16
Q

function and location of merocrine gland?

A

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

17
Q

function and location of holocrine gland?

A

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

18
Q

function and location of apocrine gland?

A

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

19
Q

what are the function of endocrine glands?

A

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