Which of the following statements correctly characterizes gastric motor activity associated with ingestion of a meal?

a. Ingested gastric volumes are accommodated with little increase in pressure by reflex relaxation of the proximal stomach

c. In humans, liquid emptying occurs more quickly than solid emptying 

With ingestion of a meal, increasing gastric volumes are accommodated with little increase in intragastric pressure by relaxation of the proximal stomach. This process, termed receptive relaxation, is mediated by a reflex carried by the vagal nerve. After the meal has been ingested, the proximal stomach is the predominant determinant of the rate of gastric emptying of liquids due to the gastroduodenal pressure gradient generated by proximal gastric contractions. Liquid emptying occurs more rapidly than emptying of solids, in part, because liquids are not subject to the sieving actions of the pylorus. Truncal and proximal gastric vagotomy abolish receptive relaxation. Following vagotomy, an increased gastroduodenal pressure gradient is observed and correlates with accelerated liquid emptying. Emptying of solids is usually not significantly altered by proximal gastric vagotomy