Question 1

Which organ is primarily responsible for breaking down the food we eat through both mechanical and chemical processes?

Accepted Answer

Digestive system

Question 2

Digestion begins in which part of the digestive tract when you chew and swallow?

Accepted Answer

Mouth

Question 3

A watery liquid called ________ makes the food wet and soft, and contains a chemical that helps digest carbohydrates.

Accepted Answer

Saliva

Question 4

Which structure connects the bottom of your throat to your stomach?

Accepted Answer

Esophagus

Question 5

The ________ is a long, narrow tube lined with tiny finger-like structures called villi, which absorb nutrients from food.

Accepted Answer

Small intestine

Question 6

Which organ produces bile, which breaks down fats and helps clean the blood?

Accepted Answer

Liver

Question 7

Leftover food that cannot be absorbed from the small intestine is pushed into which organ?

Accepted Answer

Large intestine

Question 8

From the large intestine, food that cannot be digested leaves the body through the ________.

Accepted Answer

Anus

Question 9

Which type of digestion involves enzymatic reactions to break down macromolecules?

Accepted Answer

Chemical

Question 10

The enzyme $$	ext{amylase} is $$secreted in saliva and begins the digestion of which macromolecule?

Accepted Answer

Carbohydrates

Question 11

The stomach secretes $$	ext{hydrochloric acid}$$, which creates an acidic environment that activates the enzyme $$	ext{pepsin}$$ for protein digestion. What is the chemical formula for hydrochloric acid?

Accepted Answer

$$	ext{HCl}$$

Question 12

The small intestine is the primary site of nutrient absorption and is lined with structures called ________ that increase surface area.

Accepted Answer

Villi

Question 13

Which organ produces digestive enzymes such as trypsin, lipase, and amylase, as well as $$	ext{bicarbonate} to $$neutralize stomach acid?

Accepted Answer

Pancreas

Question 14

Bile, which is important for the emulsification of ________, is produced by the liver and stored in the gallbladder.

Accepted Answer

Lipids

Question 15

The large intestine absorbs water and houses mutualistic bacteria that help break down undigested material. Which vitamin is commonly produced by these bacteria?

Accepted Answer

Vitamin K

Question 16

Peristalsis is a ________ muscular contraction that moves food through the digestive tract.

Accepted Answer

Involuntary

Question 17

The final stage of digestion occurs in the ________, where waste is stored before being eliminated through the anus.

Accepted Answer

Large intestine

Question 18

A patient is unable to digest fats properly due to a blockage in the duct that carries bile. Which organ is most likely affected?

Accepted Answer

Gallbladder

Question 19

If the enzyme $$	ext{pepsin} is $$not secreted in the stomach, which macromolecule will not be properly digested?

Accepted Answer

Proteins

Question 20

Which process describes the movement of food through the digestive tract by rhythmic contractions?

Accepted Answer

Peristalsis

Question 21

A person with damage to the villi in their small intestine would most likely experience which symptom?

Accepted Answer

Malabsorption of nutrients

Digestive System: Structure, Function, and Processes

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