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.