GI Histology I

Question 0

what comes after the mucosa?

Answer 0

submucosa, muscularis externa, serosa OR adventitia

Question 1

what makes up the lining mucosa?

Answer 1

lining epithelium, lamina propria, muscularis mucosa

Question 2

what is the plexus found in the submucosa?

Answer 2

Meissner’s plexus

Question 3

what plexus is found between the layers of muscle making up the muscularis externa (i.e., between the inner circular and the outer longitudinal layers of the muscularis externa)?

Answer 3

Auerbach’s Plexus (also termed the myenteric Plexus)

Question 4

Peyer’s patches

Answer 4

A cluster of lymph nodes embedded in the small intestine (ileum specifically)

Question 5

large folds in the stomach are called:

Answer 5

rugae

Question 6

large folds in the small intestine are called:

Answer 6

plicae

Question 7

small projections into the intestines:

Answer 7

villi

Question 8

the esophagus is lined by a protective epithelium that is:

Answer 8

non-keratinized, stratified squamous

Question 9

why is the base of the lining epithelium darker?

Answer 9

there is a lot of mitotic activity, producing daughter cells to produce those sloughed off

Question 10

the first upper third of the esophagus is lined by ____ muscle

Answer 10

skeletal

Question 11

the middle third of the esophagus is lined by ____ muscle

Answer 11

smooth and skeletal

Question 12

the lower third of the esophagus is lined by ____ muscle

Answer 12

smooth

Question 13

cardiac glands of the esophagus are found at:

Answer 13

the junction of the esophagus and the stomach, between the cricoid cartilage and the fifth tracheal ring

Question 14

is skeletal muscle at the top of the esophagus under voluntary control? Why?

Answer 14

no, innervated by parasympathetics from the vagus

Question 15

what makes up the lining of the stomach?

Answer 15

simple columnar epithelium

Question 16

all the glands in the stomach are found in the ____, which means they are above ___

Answer 16

lining mucosa, submucosa

Question 17

there are ____ glands in the submucosa of the stomach

Answer 17

no

Question 18

the major cells found in the base of the stomach glands are called ____

Answer 18

chief cells

Question 19

the second most common cell type found in the stomach glands are called _____

Answer 19

parietal cells

Question 20

the third type of cell found in the neck of the stomach glands are called:

Answer 20

mucus neck cells

Question 21

endocrine cells found on the periphery of the glands are called:

Answer 21

enteroendocrine glands, aka argentaffin cells