Nokea
A lack of functioning salivary amylase would prevent an individual from being able to digest lactose
- A. TRUE
- B. FALSE
Correct Answer: B
Rationale: Salivary amylase digests starches, not lactose. Lactose digestion occurs in the small intestine via lactase.
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Obstruction of the common bile duct by gallstones would most likely affect the digestion of:
- A. carbohydrates
- B. fats
- C. proteins
- D. nucleic acids
Correct Answer: B
Rationale: Bile is essential for the emulsification and digestion of fats. An obstruction in the common bile duct would impair fat digestion.
All about Bile is true EXCEPT:
- A. Formed by gall bladder
- B. Formed by hepatocytes
- C. Concentrated in gall bladder
- D. Discharged into duodenum under effect of cholecystokinin.
Correct Answer: A
Rationale: Bile is formed by hepatocytes, not the gallbladder, which only concentrates and stores it.
What is the name of the tube that carries food from the mouth to the stomach?
- A. Trachea
- B. Oesophagus
- C. Duodenum
- D. Food tube
Correct Answer: B
Rationale: The esophagus is the muscular tube that transports food from the mouth to the stomach. The trachea is for air, the duodenum is part of the small intestine, and 'food tube' is not a scientific term.
The contraction and expansion of the walls of food pipe is called movement.
- A. Peristalsis
- B. Gastric
- C. Oscillatory
- D. Diastolic
Correct Answer: A
Rationale: Peristalsis is a type of wave-like movement occurring in the alimentary canal which involves contraction and relaxation of the muscles. It begins in the esophagus and helps to move the food along the alimentary canal for the process of digestion.
The hormone involved in the discharge of pancreatic juice in mammal is called-
- A. Gastrin
- B. Secretin
- C. Secretin & CCK
- D. Enterogasterone
Correct Answer: C
Rationale: Both secretin and CCK stimulate pancreatic juice secretion.