Peristalsis involves coordinated contraction and relaxation______________?
Correct answer: D. Above and below the food bolus
- A. None of the aboveConsult Online Doctors
- B. Lateral and medial to food bolus
- C. Dorsal and ventral to food bolus
- D. Above and below the food bolus
Explanation
A distended segment of gut contracts above the bolus while the segment below relaxes, propelling contents forward. This coordinated pattern is the basis of peristalsis.
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