histology

Question 1

name the 4 layers of the digestive system from inside out

Answer 1

mucosa
submucosa
muscularis
serosa

Question 2

4 components GI mucosa

Answer 2

basal lamina
epithelium
lamina propria
muscularis mucosa

Question 3

what is the lamina propria

Answer 3

thin layer of smooth muscle

Question 4

what is the muscularis mucosa

Answer 4

layer of loose connective tissue

Question 5

what is the submucosa

Answer 5

outer layer of connective tissue

Question 6

what is the muscularis layer

Answer 6

2 layers of thick muscle

Question 7

describe the muscularis layer

Answer 7

outer longitudinal layer
nerve plexus
inner circular layer

Question 8

what is the enteric nervous system

Answer 8

nervous system of the GI tract

Question 9

describe protective mucosa

Answer 9

non-keratinised stratified squamous epithelium

Question 10

where is protective mucosa found (4)

Answer 10

oral cavity
pharynx
oesophagus
anal canal

Question 11

describe secretory mucosa

Answer 11

simple columnar epithelium with extensive tubular glands

Question 12

where is secretory epithelium found

Answer 12

stomach

Question 13

where is absorptive mucosa found

Answer 13

small intestine

Question 14

describe absorptive mucosa

Answer 14

simple columnar epithelium with villi and tubular glands

Question 15

describe the basic structure of a liver lobule

Answer 15

portal triad at each corner, central vein

Question 16

whats involved in the portal triad

Answer 16

bile duct
branch of hepatic artery
portal vein

Question 17

what lines the trachea

Answer 17

respiratory epithelium

Question 18

describe blood flow in a liver lobule

Answer 18

from portal and hepatic artery towards central vein through sinusoids

Question 19

what is respiratory epithelium

Answer 19

pseudo-stratified, ciliated columnar epithelium with goblet cells

Question 20

what lines the alveoli

Answer 20

simple squamous epithelium

Question 21

what is the main functional unit of the kidney

Answer 21

nephron

Question 22

name the 3 basic layers of a blood vessel

Answer 22

tunica intima
tunica media
tunica externa

Question 23

what is tunica intima

Answer 23

endothelium

Question 24

what is tunica media

Answer 24

smooth muscle

Question 25

what is tunica externa

Answer 25

connective tissue

Question 26

what is used for fixation of tissue

Answer 26

formalin

Question 27

give an example of an acidic cell stain

Answer 27

eosin

Question 28

give an example of a basic stain

Answer 28

haematoxylin

Question 29

apical side of the epithelium

Answer 29

faces the lumen of a tube or the external environment

Question 30

basal side of the epithelium

Answer 30

attaches to the basement membrane

Question 31

what is the most common type of cartilage

Answer 31

hyaline

Question 32

role of schwann cells

Answer 32

produce myelin