Digestive System Quiz & Flashcards

The small intestine is the main site of nutrient absorption, while the stomach and large intestine have other functions.

The stomach uses acid and enzymes to break down food, while nutrient absorption occurs in the small intestine.

Pepsin breaks down proteins in the stomach; other enzymes target different nutrients.

Cholecystokinin triggers bile release, aiding fat digestion, while other hormones have different roles.

The liver produces bile, which is stored in the gallbladder; it does not directly absorb nutrients.

Villi increase absorption surface area, while other options are roles of different structures.

The large intestine absorbs water and forms stool, distinct from the digestive roles of the stomach or small intestine.

Gastrin stimulates gastric acid production, while other hormones regulate different processes.

Saliva contains amylase, which starts carbohydrate digestion, but doesn't digest proteins or emulsify fats.

Fiber helps prevent constipation by adding bulk to stool, not by slowing digestion or affecting acid.

The pancreas produces enzymes for digestion, while insulin regulation is a separate function.

Hydrochloric acid activates pepsin for protein digestion, not neutralizing or emulsifying.

Though often thought to be useless, the appendix may play a role in immune function.

The small intestine is where most chemical digestion and nutrient absorption occur.

Swallowing begins with voluntary tongue action, followed by involuntary reflexes.

Peristalsis involves wave-like contractions that move food through the digestive tract.

Chyme is the semi-liquid form of food after it's processed in the stomach, not an enzyme or hormone.

The gallbladder stores bile produced by the liver; it does not produce it or digest nutrients.

The liver detoxifies chemicals and metabolizes drugs, unlike the pancreas or stomach.

The pyloric sphincter regulates chyme flow into the small intestine, not bile or acid reflux.

Bile salts emulsify fats for easier digestion, not breaking down proteins or carbohydrates.

The enteric nervous system autonomously regulates digestion, distinct from enzyme production.

Lipase digests fats, while pepsin and amylase target proteins and carbohydrates, respectively.

Microvilli increase absorptive surface area, enhancing nutrient absorption, not hormone secretion.

The stomach secretes mucus to protect its lining from acid damage, not by absorbing acids.

Secretin stimulates bicarbonate release to neutralize chyme, not directly affect bile or absorption.

The large intestine absorbs water, forming solid waste, unlike the stomach or esophagus.

Cholecystokinin triggers enzyme release from the pancreas, while other options regulate different processes.

H. pylori infection is a major cause of ulcers, rather than diet or viral factors.

Emulsification breaks fats into droplets, increasing the area for lipase action, not solubility.

Lactose intolerance results from insufficient lactase, not related to bile or other enzymes.

Probiotics help maintain healthy gut bacteria, aiding digestion and immunity.

Amylase begins carbohydrate digestion in the mouth, unlike lipase or pepsin.

The tongue positions food for chewing and forms a bolus, not producing enzymes.

Stress can slow digestion and exacerbate issues like IBS, not increase enzyme production.

The gastrocolic reflex increases colonic activity post-meal, not related to bile or acid.

GERD is chronic acid reflux into the esophagus, unrelated to enzymes or bile ducts.

The liver detoxifies blood, while the pancreas and gallbladder have other roles.

The hepatic portal vein carries absorbed nutrients to the liver for processing.

Antacids neutralize stomach acid, providing relief from heartburn, not affecting bile or enzymes.

The rectum stores feces before excretion, not involved in digestion or bile production.

Amylase breaks down starches into sugars, unlike lipase or pepsin.

Gastric mucus protects the stomach lining from acid damage, not for nutrient absorption.

Secretin stimulates the release of bicarbonate to neutralize chyme, not gastrin or glucagon.

The large intestine absorbs water and forms stool, unlike the stomach or esophagus.

The esophagus transports food to the stomach via peristalsis, not involved in nutrient absorption.

The ileum absorbs vitamin B12 and bile salts, not involved in bile production.

The duodenum neutralizes stomach acid and begins nutrient absorption, not storing bile.

Chewing increases the surface area of food for better enzyme access, not starting protein digestion.

Lactase breaks down lactose into glucose and galactose, unlike amylase or lipase.

The small intestine is the main site for nutrient absorption, not bile production.

The mucosal layer protects the stomach lining from damage by acid and enzymes.