$$\text{Protein} + \text{H}_2\text{O} \rightarrow \text{Amino acids}$$

$$\text{Starch} + \text{H}_2\text{O} \xrightarrow{amylase} \text{Maltose}$$

Question 1

Which of the following nutrients is NOT digested by the human digestive system?

Accepted Answer

Vitamins

Question 2

What is the primary function of bile in the digestive system?

Accepted Answer

Emulsifying fats to increase surface area for enzyme action

Question 3

Herbivores and carnivores have different digestive systems. Which adaptation is most commonly found in herbivores?

Accepted Answer

Multiple stomach chambers for fermenting plant material

Question 4

Which equation best represents the hydrolysis of proteins during digestion?

Accepted Answer

$$	ext{Protein} + 	ext{H}_2	ext{O} ightarrow 	ext{Amino acids}$$

Question 5

A cow has four stomachs. What is the main advantage of this adaptation?

Accepted Answer

It enables the breakdown and fermentation of cellulose from plant material.

Question 6

Which organ is primarily responsible for the absorption of nutrients in the human digestive system?

Accepted Answer

Small intestine

Question 7

Which of the following is a correct sequence of the human digestive tract?

Accepted Answer

Esophagus → Stomach → Small intestine → Colon

Question 8

Which macromolecule is broken down by protease enzymes?

Accepted Answer

Proteins

Question 9

Why are minerals not digested in the human digestive system?

Accepted Answer

They are already in their simplest chemical form and do not require breakdown.

Question 10

A patient is unable to produce bile. Which nutrient will be most affected in their digestion?

Accepted Answer

Fats

Question 11

Which of the following is NOT a function of the colon in the digestive system?

Accepted Answer

Digestion of proteins

Question 12

Which of the following nutrients is absorbed without prior digestion?

Accepted Answer

Water

Question 13

Which process is responsible for the breakdown of carbohydrates in the digestive system?

Accepted Answer

Hydrolysis by amylase

Question 14

Which of the following is a correct chemical equation for the digestion of starch?

Accepted Answer

$$	ext{Starch} + 	ext{H}_2	ext{O} \xrightarrow{amylase} 	ext{Maltose}$$

Question 15

Which of the following is a reason why carnivores typically have a shorter digestive tract than herbivores?

Accepted Answer

Animal proteins are easier to digest than plant cellulose.

Question 16

Which nutrient requires emulsification before enzymatic digestion?

Accepted Answer

Fats

Question 17

A person eats a meal high in carbohydrates, proteins, and fats. Which organs will be involved in the digestion of all three macronutrients?

Accepted Answer

Small intestine and stomach

Question 18

Which of the following is NOT a product of protein digestion?

Accepted Answer

Fatty acids

Question 19

Which of the following statements best explains why vitamins do not require digestion?

Accepted Answer

Vitamins are small molecules that can be absorbed directly.

Question 20

Which enzyme is responsible for the initial breakdown of proteins in the stomach?

Accepted Answer

Pepsin

Digestive System and Nutrition in Humans and Animals

Study Guide - Practice Questions