Dr John Campbell
@campbellteaching·3.3M subscribers·3.1K videos
Digestive System 4, mechanical digestion
Posted
July 22, 2019
Views
29,296
Likes
533
Comments
22
Engagement
1.89%
July 22, 2019
29,296
533
22
1.89%
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21:58Now PlayingDigestion is mechanical and chemical
Mechanical digestion
Water and mucus soften food
Mastication
Stomach mixing waves ---- chyme
Hydrochloric acid unfolds proteins
Bile ---- fat emulsification
Segmentations
Migrating motility complex
Intestinal juice
Secretion of saliva occurs under stimulation of:
a. Gastrin
b. Salivary lipase
c. Autonomic sympathetic nervous system
d. Autonomic parasympathetic nervous system
Initial unfolding of proteins occurs under the influence of:
a. saliva
b. pepsin
c. hydrochloric acid
d. intestinal juice (succus entericus)
Which of the following is not a form of mechanical digestion?
a. gastric mixing waves
b. mastication
c. splitting of proteins by pepsin
d. emulsification by bile
e. segmentation
Intestinal juice is produced by the:
a. salivary glands
b. pancreas
c. gastric glands in the gastric pits
d. lining of the small intestine
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