The main component of bile involved in digestion and absorption is []
A. Digestive enzymes
Bile salt
C. Lecithin
D. Bile pigment
E. Fatty acids
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The absorption mechanism of most water-soluble vitamins is []
A. osmosis
B. Active transport
C. endocytosis
D. Simple diffusion
E. Facilitated diffusion
The main absorption site of vitamin B12 is []
A. Stomach
B. Duodenum
C. Jejunum
D. Ileum
E. Colon
The slow wave of gastrointestinal smooth muscle originates from []
A. Mucosal layer
B. Serous membrane layer
Circulatory muscle
D. Longitudinal muscle
E. Cajal interstitial cells
The wrong narrative about the role of digestive tract movement is []
A. Grind food
B. Mix food with digestive juice fully
C. Hydrolyze food macromolecules into small molecules
D. Push food to the distal end of the digestive tract
E. Maintain a certain pressure in the digestive tract
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