Epithelium

Question 1

what are the primary tissue types?

Answer 1

nervous tissue
muscle tissue
epithelial tissue
connective tissue

Question 2

epithelial tissue..

Answer 2

cover body surfaces
lines body cavities
form glands

Question 3

Functions of Epithelial tissue

Answer 3

physical protection 
permeability control
sensation trigger
secretion
excretion
absorption
gas exchange
gliding and lubrication (mesothelium)

Question 4

what are the tree suraces of a cell? with regards to cell polarity

Answer 4

apical
lateral
basal

Question 5

characteristics of simple squamous epithelium

Answer 5

single layer of flattened cells with disc-shaped cell nuclei

Question 6

What is the function of simple squamous epithelium?

Answer 6

diffusion & filtration

Question 7

where can you find squamous epithelium cells?

Answer 7

blood vessels, lymphatic vessels
kidney glomeruli
air sac of lungs

Question 8

simple cuboidal epithelium

Answer 8

single layer of cube-shaped cells with large, spherical nuclei

Question 9

function of cuboidal epithelium

Answer 9

absorptive or secretory

Question 10

where can you find simple cuboidal epithelium?

Answer 10

kidney tubules
ducts and secretory portion of small glands
ovary surface

Question 11

simple columnar epithelium

Answer 11

single layer of tall cells with round to oval nuclei

Question 12

function of simple columnar epithelium

Answer 12

absorption

secretion of mucus, enzymes and other substances

Question 13

location of simple columnar epithelium

Answer 13

lining of the stomach
small & large intestines
excretory ducts of some glands

Question 14

what is apical specialization?

Answer 14

microvilli as seen with simple columnar epithelium

Question 15

what do goblet cells do?

Answer 15

secrete mucus

Question 16

what is the function of simple columnar epithelium with goblet cells?

Answer 16

involved in protection by secreting mucus that lubricates the surface, or traps inhaled particles

Question 17

pseudostratified columnar epithelia

Answer 17

single layer of cells of different heights

all cells rest on the basement membrane but not all reach the surface

Question 18

function of pseudostratified columnar epithelium

Answer 18

secrete substances like mucus

propulsion of mucus by ciliary action

Question 19

where can you find pseudostratified columnar epithelium?

Answer 19

respiratory tract

epithelium of the trachea and bronchi

Question 20

identify the immage

Answer 20

pseudostratified ciliated columnar epithelium with goblet cells

Question 21

stratified squamous epithelium

Answer 21

thick epithelium composed of several cell layers
basal layers are cuboidal or columnar & metabolically active
surface cells are flattened (squamous)

Question 22

what is the function of stratified squamous epithelium

Answer 22

protects underlying tissues in areas subjected to abrasion

Question 23

how can surface epithelia cells be described as?

Answer 23

full of keratin and dean (no nuclei)

Question 24

what does non-keratinized cells mean?

Answer 24

surface cells with nuclei (viable)

Question 25

where can you find keratinized cells?

Answer 25

skin, hard palate, gingiva

Question 26

where can you find non-keratinized cells?

Answer 26

lining of esophagus, mouth of vagina

Question 27

is this keratinized or non keratinaized?

Answer 27

keratinized

Question 28

is this keratinized or nonkeratinized?

Answer 28

nonkeratinized | - there is no keratin observed on the surface

Question 29

moral than 90% of oral or pharyngeal cancers are derived from

Answer 29

epithelial cells | squamous cell carcinoma

Question 30

what are some types of uncommon epithelia?

Answer 30

stratified cuboidal epithelium (ducts of salivary glands) | stratified columnar epithelium (male urethra, pharynx)

Question 31

what is transitional epithelia?

Answer 31

represents a transition between stratified squamous and stratified columnar epithelium

Question 32

where can you find transitional epithelium?

Answer 32

urinary tract (urothelium) - ureters - bladder - portion of the urethra

Question 33

identify the image

Answer 33

transitional epithelium in relaxed state ex. when bladder is empty

Question 34

identify the image

Answer 34

transitional epithelium in extended state ex. when your bladder is full and it has to make room for more urine it goes to the extended state