The pH of chyme entering the duodenum is adjusted by a. bile. b. intestinal juice. c. enzyme secretions from the pancreas. d. bicarbonate-rich secretions from the pancreas The GI tube tissue layer...

The pH of chyme entering the duodenum is adjusted by

a. bile.

b. intestinal juice.

c. enzyme secretions from the pancreas.

d. bicarbonate-rich secretions from the pancreas

The GI tube tissue layer responsible for the actions of segmentation and peristalsis is the

a. serosa.

b. mucosa.

c. muscularis externa.

d. submucosa.