Motility and peristalsis Practice Questions
40 free Motility and peristalsis practice questions for the Physiology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.
Questions
40 questions
All Motility and peristalsis questions
- Q1. Peristalsis in the gastrointestinal tract is best described as:
- Q2. Which muscle layer contraction primarily narrows the lumen during peristalsis?
- Q3. Which nerve plexus primarily coordinates peristaltic movements?
- Q4. Which type of movement mainly serves a mixing function in the small intestine?
- Q5. The primary pacemaker cells responsible for generating slow waves are:
- Q6. Which gastrointestinal region has the slowest basic electrical rhythm?
- Q7. Which hormone increases gastric motility and emptying?
- Q8. The migrating motor complex occurs primarily during:
- Q9. Which neurotransmitter is primarily excitatory for gastrointestinal smooth muscle?
- Q10. Which movement is characteristic of the colon to propel feces over long distances?
- Q11. Relaxation ahead of the peristaltic wave is mediated mainly by:
- Q12. Which factor most strongly initiates peristalsis in the intestine?
- Q13. The law of the intestine states that peristalsis proceeds:
- Q14. Which structure prevents reflux of gastric contents into the esophagus?
- Q15. Which gastrointestinal movement predominates in the esophagus?
- Q16. Haustral contractions are characteristic of which part of the gastrointestinal tract?
- Q17. Which autonomic input generally decreases gastrointestinal motility?
- Q18. Which hormone slows gastric emptying by reducing motility?
- Q19. Pendular movements primarily occur due to alternating contraction of:
- Q20. Failure of relaxation of the lower esophageal sphincter leads to:
- Q21. Which of the following describes the electrical phenomenon known as 'slow waves' in gastrointestinal smooth muscle?
- Q22. Which ions are primarily responsible for the 'spike potentials' that lead to actual contraction in the gut wall?
- Q23. Which gastrointestinal region exhibits the highest frequency of the basic electrical rhythm (BER)?
- Q24. During a peristaltic reflex, what occurs in the segment of the intestine located immediately downstream (anal-ward) of the bolus?
- Q25. The Migrating Motor Complex (MMC) is a pattern of electromechanical activity that occurs primarily during which state?
- Q26. Which of the following best describes the 'Vagovagal reflex' in the context of gastric motility?
- Q27. A patient is found to have a lack of ganglionic cells in the myenteric plexus of the distal colon. What is the most likely clinical manifestation?
- Q28. What is the physiological significance of 'retropulsion' in the stomach?
- Q29. Which hormone is the primary mediator for inducing gallbladder contraction and simultaneously relaxing the Sphincter of Oddi?
- Q30. The 'Law of the Gut' (Polarity of the intestine) primarily refers to the fact that:
- Q31. Which of the following will decrease the rate of gastric emptying?
- Q32. Secondary peristalsis in the esophagus is distinguished from primary peristalsis because it:
- Q33. Which movement is most responsible for the mixing of chyme with digestive enzymes in the small intestine?
- Q34. What characterizes 'mass movements' in the large intestine?
- Q35. The gastroileal reflex results in the relaxation of the ileocecal valve. What is the primary trigger for this reflex?
- Q36. How do opioid medications (like morphine) typically affect gastrointestinal motility?
- Q37. Which structure acts as the physiological pacemaker for gastric motility, and where is it located?
- Q38. During the defecation reflex, which of the following is under voluntary control?
- Q39. What is the primary effect of sympathetic nervous system stimulation on the sphincters of the gastrointestinal tract?
- Q40. Which of the following neurotransmitters is the primary excitatory mediator of circular muscle contraction behind a food bolus?