Receptive Relaxation Refers to Which of the Following

Multiple Choice

Receptive relaxation refers to which of the following

A) relaxation of the pharyngoesophageal sphincter during swallowing
B) relaxation of the pyloric sphincter when the duodenum is prepared to receive chyme
C) relaxation of the external anal sphincter when the individual is receptive to the defecation reflex
D) relaxation of the stomach as it starts to fill, thereby allowing an increase in volume with very little increase in pressure