Epithelial Tissue

Question 1

what are epithelial tissues and how are they classified

Answer 1

layers of cells forming linings which attach to a basement membrane. classified according to:
no. of layers - simple vs stratified
shape - squamous vs cuboidal vs columnar vs transitional

Question 2

simple squamous epithelial cells description

Answer 2

single layer of squashed flattened cells

Question 3

stratified squamous epithelial cells description

Answer 3

multi layered flattened cells

Question 4

simple cuboidal epithelial cells description

Answer 4

single layer of cube shaped cells

Question 5

stratified cuboidal epithelial cells description

Answer 5

multiple cube shaped cell layers

Question 6

simple squamous epithelial cell example

Answer 6

blood vessel lining

Question 7

simple squamous epithelial cell function

Answer 7

smooth to reduce friction and thin for short absorption and diffusion

Question 8

stratified squamous epithelial cell example

Answer 8

skin

Question 9

stratified squamous epithelial cell function

Answer 9

physical protection due to multiple layers so damage to top means replaced by new at bottom

Question 10

simple cuboidal epithelial cell example

Answer 10

ducts and glads

Question 11

simple cuboidal epithelial cell function

Answer 11

some protection but productive e products to be secreted into ducts and glands

Question 12

stratified cuboidal epithelial cells example

Answer 12

some line ducts but mainly sweat glands

Question 13

stratified cuboidal epithelial cells function

Answer 13

more protection and secretion

Question 14

transitional epithelial cell description

Answer 14

cells that can change shape without pulling apart from one another

Question 15

transitional epithelial cell example

Answer 15

urinary bladder

Question 16

transitional epithelial cell function

Answer 16

cells change shape allowing expansion and recoil of bladder

Question 17

simple columnar epithelial cells description

Answer 17

single layer of tall cells

Question 18

simple columnar epithelial cells example

Answer 18

lining of stomach or small intestine

Question 19

simple columnar epithelial cells function

Answer 19

allow protection and absorption as nutrients can metabolise as they pass through the tall cell

Question 20

pseudostratified columnar epithelial cells description

Answer 20

look stratified but all attached to basement membrane just different heights with nuclei in different places

Question 21

pseudostratified columnar epithelial cells example

Answer 21

lining of trachea, nasal cavity and bronchi

Question 22

pseudostratified columnar epithelial cells function

Answer 22

produce mucus to trap dust and pathogens moving it top via cilia

Question 23

stratified columnar epithelial cells description

Answer 23

several layers of tall cells

Question 24

stratified columnar epithelial cells example

Answer 24

small areas in pharynx

Question 25

stratified columnar epithelial cells function

Answer 25

allow for more protection eg from acids