digestion, absorption, motility, secretion, storage
What are the functions of the digestive system?
motility
-collection and elimination of waste
amylase
Saliva contains ________ ,which helps break down starch.
c
The epiglottis is located in the _______.
a) trachea
b)esophagus
c) pharynx
d) laryngopharynx
mucus secretion & peristalsis of food
What are the functions of esophagus?
heartburn
________ is an irritation of the esophagus
bacterial digestion, ferment carbs, concentrate wastes, absorb more water
What are functions of the large intestine?
mucosa, submucosa, muscularis externa, serosa
Order the layers of the esophagus from innermost to outermost.
mucosa
-consists of a surface epithelium and an underlying connective tissue call lamina propria.
a
Which layer of the esophagus has cells that secrete mucus to protect the alimentary canal?
a) mucosa
b)submucosa
c) muscularis externa
d) serosa
b
Which layer of the esophagus contains blood vessels, nerves, glands, and lymphatic vessels?
a) mucosa
b)submucosa
c) muscularis externa
d) serosa
c
Which layer of the esophagus has an inner circular layer and outer longitudinal layer of smooth muscle?
a) mucosa
b)submucosa
c) muscularis externa
d) serosa
d
Which layer of the esophagus is suspended by mesentery?
a) mucosa
b)submucosa
c) muscularis externa
d) serosa
d
Which layer of the esophagus is lined by serous membrane called peritoneum?
a) mucosa
b)submucosa
c) muscularis externa
d) serosa
cardia, fundus, body, pylorus
What are the 4 regions of the stomach?
cardia
-is the region of the stomach immediately surrounding the junction of the esophagus with the stomach.
fundus
-is the region of the stomach superior to the gastroesophageal junction
body
-is the largest region of the stomach and lies between the fundus and the lower curving segment of the J.
pylorus
-has thick wall with strong frequent peristaltic contractions that mix and propel food into the duodenum
-is responsible for gastric emptying into duodenum
cardiac sphincter
cardia is separated from the esophagus via
d
Which region(s) of the stomach is the only one with G cells & D cells?
a) cardia
b) fundus & body
c) pyloric region
d) all of the above
b,c
Which region(s) of the stomach is the only one with chief cells?
a) cardia
b) fundus & body
c) pyloric region
d) all of the above
a,b
Which region(s) of the stomach contain parietal cells?
a) cardia
b) fundus & body
c) pyloric region
d) all of the above
c
Which region(s) has glands primarily made of mucus-secreting cells?
a) cardia
b) fundus & body
c) pyloric region
d) all of the above
D cells
Somatostatin-secreting cells =
G cells
Gastrin-secreting cells =
intrinsic factor
-a substance necessary for absorption of vitamin B12
parietal cells
-secrete HCL & intrinsic factor
chief cells
-secrete pepsinogen
-gets converted to active form, pepsin, by acids of stomach
gastrin
-stimulates gastric juice secretion and gastric motility