Lecture 9 - MC

Question 1

What is one of the primary effects of dietary fiber on stomach functions?
A) Speeds up stomach emptying
B) Delays stomach emptying and alters small intestine transit time
C) Increases the breakdown of food in the stomach
D) Enhances absorption of micronutrients in the stomach

Answer 1

B

Question 2

How does dietary fiber influence the transit time in the small intestine?
A) Slows down significantly
B) Does not affect transit time
C) Accelerates transit time; triggers contractions
D) Completely stops transit

Answer 2

C

Question 3

What role does fiber play in the mixing of GI contents with digestive enzymes?
A) Enhances enzyme efficiency
B) Decreases the mixing of GI contents with digestive enzymes
C) Has no effect on enzyme mixing
D) Only affects carbohydrate enzymes

Answer 3

B

Question 4

How does dietary fiber affect the glycemic response to food?
A) Increases the glycemic response
B) Has no effect on glycemic response
C) Reduces the glycemic response
D) Changes the type of glycemic response

Answer 4

C

Question 5

What is a direct result of fiber decreasing the absorption of lipids?
A) Increased bile acid reabsorption
B) Decreased bile acid excretion
C) Increased bile acid excretion
D) Decreased bile acid production

Answer 5

C

Question 6

How do SCFAs affect the mucosal cells of the colon?
A) Inhibit their proliferation
B) Promote differentiation and proliferation
C) Decrease their energy uptake
D) Have no effect on mucosal cells

Answer 6

B

Question 7

What effect do SCFAs have on hepatic cholesterol synthesis?
A) Promote synthesis
B) Inhibit synthesis
C) Have no effect
D) Increase cholesterol breakdown

Answer 7

B

Question 8

Which of the following is an effect of SCFAs on the gastrointestinal tract’s environment?
A) Increases pH and bile solubility
B) Has no impact on pH or bile solubility
C) Decreases pH, reduces bile solubility, and increases Ca2+ binding to bile and fatty acids
D) Increases pH and decreases bile solubility

Answer 8

C