Nokea
Which part of the digestion process speeds up the break down of food?
- A. enzymes
- B. peristalsis
- C. villi
- D. bile
Correct Answer: A
Rationale: Enzymes are biological catalysts that accelerate the chemical breakdown of food.
You may also like to solve these questions
Dental formula of adult human is -
- A. 2123/2123
- B. 2123/2122
- C. 2124/2124
- D. 2132/2132
Correct Answer: D
Rationale: The dental formula of an adult human is 2132/2132, representing 2 incisors, 1 canine, 3 premolars, and 2 molars per quadrant.
Enzyme maltase in human gut acts on food at a pH of -
- A. More than 7 to change starch into maltose.
- B. Less than 7 to change starch into maltose.
- C. More than 7 to change maltose into glucose.
- D. Less than 7 to change maltose into glucose.
Correct Answer: C
Rationale: Maltase works in the small intestine (pH > 7) to convert maltose into glucose.
A digestive enzyme, salivary amylase, in the saliva begin digestion of-
- A. Carbohydrates
- B. Protein
- C. Fats
- D. Nucleic acids
Correct Answer: A
Rationale: Salivary amylase (ptyalin) in saliva begins the digestion of carbohydrates by breaking down starches into simpler sugars like maltose.
Which of the following hormones is responsible for stimulating gallbladder contraction and the release of bile into the small intestine during the intestinal phase of digestion?
- A. Cholecystokinin (CCK)
- B. Secretin
- C. Gastrin
- D. Glucagon
Correct Answer: A
Rationale: CCK, released in response to fats in the duodenum, stimulates gallbladder contraction and bile release for fat digestion.
Which substance destroy the harmful bacteria in stomach?
- A. Cerumin
- B. Chyme
- C. HCl
- D. Secretin
Correct Answer: C
Rationale: HCl in the stomach kills harmful bacteria ingested with food.