Which of the following best describes how food moves through the digestive system, from mouth to anus?
Defecation
Emulsification
Peristalsis
Mastication
The Correct Answer is C
A. Defecation: This is the elimination of feces from the rectum, not the process of moving food through the GI tract.
B. Emulsification: This refers to breaking down fat into smaller droplets (done by bile), not the movement of food.
C. Peristalsis: Peristalsis is the rhythmic muscular contraction that propels food through the digestive tract.
D. Mastication: This is chewing, a mechanical process that occurs in the mouth before food enters the esophagus.
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Correct Answer is D
Explanation
A. Absorption: Absorption refers to nutrients being taken into the bloodstream, mainly in the intestines.
B. Peristalsis: Peristalsis is the muscular movement of food through the digestive tract, not chewing.
C. Regulation: Regulation refers to control mechanisms in digestion but not to the act of chewing.
D. Mechanical digestion: Chewing breaks food into smaller pieces, which is mechanical digestion and prepares food for chemical digestion.
Correct Answer is A
Explanation
A. Stomach: The esophagus carries food from the pharynx and empties it into the stomach via the lower esophageal sphincter.
B. Cecum: The cecum is part of the large intestine and is much further along in the digestive tract.
C. Common bile duct: This duct transports bile, not food. It is not directly connected to the esophagus.
D. Duodenum: The duodenum is the first part of the small intestine, which comes after the stomach, not directly after the esophagus.
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