GI Digestive Processes Review Exam Q & A 2026 (Complete And Verified Study material) (19pages) LEARNEXAMS

1. Which hormone is primarily responsible for stimulating the secretion of

pancreatic juices during digestion?

 A) Gastrin

 B) Secretin

 C) Cholecystokinin

 D) GIP

 Answer: B) Secretin

 Rationale: Secretin primarily stimulates the pancreas to release a

bicarbonate-rich fluid, which neutralizes the gastric acid entering the small

intestine from the stomach.

2. In cases of lactose intolerance, the deficiency of which enzyme would

be suspected?

 A) Amylase

 B) Lactase

 C) Lipase

 D) Pepsin

 Answer: B) Lactase

 Rationale: Lactase is necessary for the digestion of lactose, the sugar

found in milk. Deficiency leads to lactose intolerance, where undigested

lactose ferments in the colon, causing symptoms.

3. What is the primary function of the gallbladder in digestive processes?

 A) Production of bile

 B) Storage and concentration of bile

 C) Enzymatic digestion of proteins

 D) Absorption of nutrients

 Answer: B) Storage and concentration of bile

 Rationale: The gallbladder stores and concentrates bile produced by the

liver until it is needed for digestion of fats in the duodenum.

4. Which part of the gastrointestinal tract is primarily involved in water

absorption?

 A) Stomach

 B) Small intestine

 C) Large intestine (colon)

 D) Rectum

 Answer: C) Large intestine (colon)