The oral phase of swallowing is under ________ control and the pharyngo-esophageal phase is ________.

A. central nervous system; also controlled by the central nervous system
B. voluntary; also voluntary
C. autonomic nervous system; controlled by autonomic reflexes
D. central nervous system; controlled by autonomic reflexes
E. involuntary; also involuntary


Answer: D

Anatomy & Physiology

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