Receptive Relaxation Refers to Relaxation of the

Multiple Choice

Receptive relaxation refers to relaxation of the

A) pharyngoesophageal sphincter during swallowing
B) pyloric sphincter when the duodenum is prepared to receive the chyme
C) external anal sphincter when the individual is receptive to the defecation reflex
D) stomach as it starts to fill, thereby allowing an increase in volume with very little increase in pressure
E) none of the above