Question

What is the function of the bicarbonate ions secreted by the pancreas?

	to stimulate the release of bile from the gallbladder
	to facilitate the transport of nutrients across the intestinal wall
	to prevent enzymes that digest carbohydrates and fats in the small intestines from becoming denatured
	to stimulate secretion of the hormone secretin
	All of these choices are correct.

Answer 1

Hi Answer:

Answer: Option C. (to prevent enzymes that digest carbohydrates and fats in the small intestines from becoming denatured)

Explanation: During the food digestion process when the chime enters into small intestine that time due to different food composition as well as the presence of the HCl and pepsin it becomes very acidic. This acidic chime sends both nervous signals (via vagus nerve) and hormonal signals (via secreting cholecystokinin) to pancreas for the neutralization of acidic content. On receiving these signals pancreas secrete pancreatic juice (having bicarbonte ion) which neutralizes the chime and makes it slightly alkaline which prevents the denaturation of carbohydrate and fat digesting enzymes and facilitates the food digestion.