Question

the stimulus for the swallowing reflex is the movement of food and drink into the pharynx. what is its response?

Explanation:

When food or drink moves into the pharynx, it triggers the swallowing reflex. This reflex involves coordinated contractions of smooth and skeletal muscles. These contractions help move the food or drink safely from the pharynx into the esophagus and then to the stomach.

• The first option (reduction in heart rate and force of contraction) is related to the autonomic nervous system's effect on the heart, not the swallowing reflex.
• The second option (increased glandular secretions and sensitivity) is more related to processes like digestion initiation in the mouth (e.g., salivation) rather than the swallowing reflex itself.
• The third option (sudden explosive ejection of air) is characteristic of actions like coughing or sneezing, not swallowing.

Answer:

Smooth muscle and skeletal muscle contractions