Nokea
Which of the following is not a major gastrointestinal hormone?
- A. epinephrine
- B. secretin
- C. gastrin
- D. cholecystokinin
Correct Answer: A
Rationale: Epinephrine is not a gastrointestinal hormone; it is primarily involved in the sympathetic nervous system.
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Into which tubes do the nephrons drain?
- A. Proximal convoluted tubule
- B. Collecting duct
- C. Distal convoluted
- D. Ureter
Correct Answer: B
Rationale: Nephrons drain into collecting ducts, which lead to the ureter.
Which process matches the definition: Circular muscles behind a bolus of food contract and longitudinal muscles relax, thus pushing a bolus of food onwards?
- A. Segmentation
- B. Peristalsis
- C. Emesis
- D. Deglutition
Correct Answer: B
Rationale: Peristalsis involves coordinated muscle contractions to push food forward.
Choose the answer which lists the correct order of the digestion process.
- A. A, C, D, B
- B. C, D, A, B
- C. C, A, D, B
- D. D, C, A, B
Correct Answer: B
Rationale: The correct order is: Food is ingested (C), digested (D), nutrients absorbed (A), and undigested food eliminated (B).
Which of the following secretions is NOT produced by gastric glands?
- A. hydrochloric acid
- B. intrinsic factor
- C. pepsin
- D. sebum
Correct Answer: D
Rationale: Sebum is an oily substance produced by sebaceous glands in the skin, not by gastric glands, which secrete HCl, intrinsic factor, and pepsin.
Which is the longest organ of digestive system in human body?
- A. Pancreatic duct
- B. Small intestine
- C. Large intestine
- D. Esophagus
Correct Answer: B
Rationale: The small intestine is the longest part of the digestive system, measuring about 7 meters (22 feet). Its main functions are to complete the digestion of food and to absorb nutrients.