Practice CFA - The Digestive System

How does mechanical digestion differ from chemical digestion?

• Mechanical involves enzymes; chemical involves chewing
• Mechanical changes food’s structure; chemical changes molecules
• Mechanical occurs in the pancreas; chemical occurs in the liver
• Mechanical uses acids; chemical uses physical motion

Why would removing the large intestine severely affect the body’s balance?

• It helps digest all fats and proteins
• It produces most of the body’s insulin
• It absorbs water and forms solid waste
• It neutralizes acids from the stomach

If the gallbladder fails to release bile, what process will be most directly affected?

• Digestion of carbohydrates in the mouth
• Breakdown of proteins in the stomach
• Emulsification of fats in the intestine
• Absorption of water in the colon

A person has difficulty swallowing food. Which part of the digestive system is most likely affected?

• Pancreas due to enzyme shortage
• Esophagus due to muscle function
• Stomach due to acid production
• Liver due to bile secretion

Which organ is responsible for nutrient absorption into the blood?

• Esophagus through smooth muscle action
• Stomach through chemical breakdown
• Small intestine through villi structures
• Large intestine through water removal

What is the main function of the digestive system?

• To produce energy for cellular respiration
• To circulate nutrients to all body systems
• To regulate hormones in the bloodstream
• To break down food for nutrient absorption

How does the stomach protect itself from its own acidic environment during digestion?

• It produces a thick layer of mucus that coats its lining, preventing damage from stomach acid.
• It releases enzymes that neutralize the acid before it can cause any harm to the stomach walls.
• It continuously replaces its lining every few hours to avoid the effects of acid damage.
• It reduces its acid production during food digestion to prevent any irritation.

Teeth chewing is an example of what type of digestion?

• Mechanical digestion
• Indigestion
• Gastrointestinal digestion
• Chemical digestion

What do you call the wave-like motion in your esophagus in the digestion process?

• Pertalsis
• Peristalsis
• Peristals
• Perstalation

Emma ate a meal that was high in fats. After digestion in the stomach, the chyme moves into the small intestine. What is most likely happening during this stage?

• Bile from the liver is being released to emulsify fats for easier absorption.
• The stomach is releasing more acid to further break down the food.
• Enzymes in the large intestine are beginning to absorb water from the chyme.
• The pancreas is filtering out toxins before the nutrients enter the bloodstream.