Epithelial Tissue

Question 1

Derived from

Answer 1

all three primary germ layers

Question 2

Epithelia structure

Answer 2

apical surface, epithelium, basal surface, basement membrane (basal lamina and reticular lamina), connective tissue

Question 3

Epithelia general features

Answer 3

closely packed with little extracellular material, no blood vessels, good nerve supply, high rate of mitosis

Question 4

Epithelial cell arrangement types

Answer 4

simple, pseudostratified, stratified

Question 5

simple

Answer 5

one layer

Question 6

pseudostratified

Answer 6

all cells are attached to basement membrane but some do not reach apical surface

Question 7

stratified

Answer 7

many layers

Question 8

Epithelial cell shapes

Answer 8

squamous, cuboidal, columnar

Question 9

Simple squamous

Answer 9

one layer flat cells, good for diffusion and filtration, lungs and kidneys

Question 10

simple cuboidal

Answer 10

one layer cube cells, good for secretion and absorption, kidneys and thyroid gland

Question 11

simple columnar

Answer 11

one layer rectangle cells, good for processes, goblet cells, line stomach and intestines

Question 12

pseudostratified ciliated columnar

Answer 12

surface cells either secrete mucus (goblet cells) or bear cilia that sweep away mucus and foreign particles, line respiratory system

Question 13

nonkeratinized stratified squamous

Answer 13

many layers flat cells, protective, found in areas often abrated

Question 14

keratinized stratified squamous

Answer 14

tough layer of keratin deposited on top layer of cells, resistant to friction and repels bacteria

Question 15

transitional epithelium

Answer 15

multilayered, surface cells vary in shape, lines hollow organs that expand from within like urinary bladder