Free Gastrointestinal Physiology MCQs with Answers
44 Gastrointestinal Physiology MCQs from Physiology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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41. The oral and pharyngeal phases of swallowing take place very rapidly and last about______________?
- A. 3.5 seconds
- B. 9.5 seconds
- C. 6.0 seconds
- D. 1-1.5 seconds
Explanation: The oral and pharyngeal phases together propel the bolus rapidly and usually take about 1 to 1.5 seconds.
Correct answer: 1-1.5 seconds- A. Submucosa
- B. Lamina propria
- C. Muscularis
- D. Serosa
Explanation: Most diffuse GALT is found in the lamina propria, where lymphocytes, plasma cells, and other immune cells monitor intestinal contents.
Correct answer: Lamina propria- A. Heme
- B. Biliverdin
- C. Stercobilin
- D. Bilirubin diglucuronide
Explanation: Intestinal bacteria convert bilirubin derivatives into stercobilin, the pigment responsible for the normal brown colour of stool.
Correct answer: Stercobilin- A. sensory stimulation
- B. Sympathetic stimulation
- C. CNS stimulation
- D. Parasympathetic stimulation
Explanation: Parasympathetic stimulation produces a copious, watery secretion from the salivary glands.
Correct answer: Parasympathetic stimulation