This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which of the following processes is not a true component of swallowing? 
Select and explain. 
A. Closure of the glottis., B. Involuntary relaxation of the upper esophageal sphincter., C. Movements of the tongue against the palate., D. Esophageal peristalsis.
C: Movements of the tongue against the palate.
Answer: C: Movements of the tongue against the palate. 
Explanation: The movement of the tongue against the palate is the only voluntary process among the four possible answers