18 Questions
Which enzyme present in the stomach acts on proteins by denaturing them?
HCl
What happens to breathing when food enters the nasopharynx?
Breathing temporarily stops
What protects the stomach from self-digestion by its acidic contents?
Mucous
Which component neutralizes acid in the small intestine to allow pancreatic enzymes to function effectively?
Alkaline fluid (HCO3-)
Which hormone is responsible for increasing pancreatic enzyme secretion by the duodenum?
Cholecystokinin (CCK)
What is the primary effect of cholecystokinin (CCK) on the body?
Stimulates pancreatic enzyme secretion
What is the effect of gallbladder contractions on gastric motility and secretion?
Decrease gastric motility and secretion
What enzyme deficiency leads to lactose intolerance due to undigested lactose reaching the large intestine?
Lactase deficiency
What is the main function of bile salts in fat digestion and absorption?
Emulsification of fat globules
Where does absorption of nutrients primarily occur due to the large surface area?
Small intestine
What is the source of bile pigments found in bile?
Liver
Which organ synthesizes bile required for fat digestion and absorption?
Liver
What triggers the Cephalic Phase, preparing the stomach for food?
Sight and smell of food
What is the pH of the stomach when it is nearly empty?
pH 3
Which hormone is responsible for slowing down gastric emptying during the Intestinal Phase?
Cholecystokinin (CCK)
What triggers duodenal gastrin release during the Intestinal Phase?
Duodenal stretch
Which inhibitory signal causes a decrease in gastric motility during the Intestinal Phase?
Enterogastric reflex
What is the main effect of secretin released due to acid during the Intestinal Phase?
Decreases gastric motility
Test your knowledge on the digestive system enzymes and absorption processes, including the breakdown of carbohydrates, proteins, and lipids. Understand how the intestinal wall enzymes work and the role of absorption in nutrient processing.
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