$$\text{Nutrient molecules} \rightarrow \text{CO}_2 + \text{H}_2\text{O} + \text{NH}_3 + \text{energy}$$

Question 1

Which of the following best describes the process of protein catabolism in the body?

Accepted Answer

Proteins are broken down into amino acids, which undergo proteolysis to produce CO$$_2$$, H$$_2O$$, NH$$_3$$, and energy.

Question 2

During positive energy balance, which of the following occurs?

Accepted Answer

Energy intake exceeds energy output, and excess energy is stored, leading to weight gain.

Question 3

Which tissue is the primary storage site for triglycerides in the human body?

Accepted Answer

Adipose tissue

Question 4

What is the main form in which carbohydrates are stored in the body?

Accepted Answer

Glycogen

Question 5

Which equation correctly represents the oxidation of nutrient molecules during cellular respiration?

Accepted Answer

$$	ext{Nutrient molecules} ightarrow 	ext{CO}_2 + 	ext{H}_2	ext{O} + 	ext{NH}_3 + 	ext{energy}$$

Question 6

Which of the following is NOT a function of nutrients in the body?

Accepted Answer

Directly converted to ATP without any intermediate steps

Question 7

What is the basal metabolic rate (BMR)?

Accepted Answer

The minimum rate of energy expenditure necessary to maintain body functions while awake, resting, and fasted.

Question 8

Which of the following factors does NOT directly influence metabolic rate?

Accepted Answer

Blood type

Question 9

If a person consumes 2500 kcal/day and expends 2000 kcal/day, what is their energy balance?

Accepted Answer

Positive energy balance of 500 kcal/day

Question 10

Which process is responsible for breaking down stored glycogen into glucose?

Accepted Answer

Glycogenolysis

Question 11

During cellular respiration, which molecule is primarily responsible for storing and transferring energy for cellular work?

Accepted Answer

ATP

Question 12

Which of the following statements about energy storage is correct?

Accepted Answer

Most energy is stored as triglycerides in adipose tissue.

Question 13

Which pathway describes the conversion of amino acids to urea in the liver?

Accepted Answer

Amino acids undergo proteolysis, producing NH$$_3$$, which is converted to urea in the liver.

Question 14

Which enzyme is responsible for hydrolyzing triglycerides in lipoproteins to release fatty acids?

Accepted Answer

Lipoprotein lipase (LPL)

Question 15

Which of the following best explains why elderly individuals typically have a lower basal metabolic rate?

Accepted Answer

They have a higher proportion of adipose tissue and less actively growing tissue.

Question 16

Which of the following is a correct multi-step pathway for lipid metabolism?

Accepted Answer

Triglycerides are hydrolyzed by lipoprotein lipase, fatty acids enter cells, undergo lipolysis, and are converted to CO$$_2$$, H$$_2O$$, and energy.

Question 17

Which of the following best describes compartmentation in metabolism?

Accepted Answer

The regulation of metabolic pathways by controlling the location of enzymes in specific cells, tissues, and organs.

Question 18

A patient with a negative energy balance will most likely experience which of the following?

Accepted Answer

Weight loss due to mobilization of energy from adipose tissue.

Question 19

Which of the following is the correct formula for calculating energy balance?

Accepted Answer

$$	ext{Energy balance} = 	ext{Energy intake} - 	ext{Energy output}$$

Question 20

Which of the following is a real-life example of negative energy balance?

Accepted Answer

A marathon runner who burns more calories than consumed during training.

The Endocrine System: Regulation of Energy Metabolism and Growth

Study Guide - Practice Questions