Question 1

Which of the following best describes metabolism?

Accepted Answer

The sum of all chemical reactions in the body that convert compounds from one form to another.

Question 2

Which organ is the most metabolically active and is responsible for metabolizing, storing, and distributing nutrients after absorption?

Accepted Answer

Liver

Question 3

During which metabolic state do anabolic processes exceed catabolic processes?

Accepted Answer

Absorptive state

Question 4

Which hormone promotes lipolysis during the postabsorptive state?

Accepted Answer

Glucagon

Question 5

What is the primary energy source for red blood cells and the central nervous system?

Accepted Answer

Glucose

Question 6

Which metabolic pathway is responsible for the breakdown of glucose to pyruvate?

Accepted Answer

Glycolysis

Question 7

Which of the following is an example of an anabolic reaction?

Accepted Answer

Formation of glycogen from glucose

Question 8

What is the role of adenosine triphosphate (ATP) in cellular metabolism?

Accepted Answer

ATP acts as the cell's direct energy source, storing energy in its phosphate bonds.

Question 9

Which process occurs during prolonged fasting when fat reserves are depleted and muscle tissue is broken down for energy?

Accepted Answer

Starvation

Question 10

Which metabolic pathway produces the most ATP per minute but is limited in duration and is used in high-intensity, short-duration activities?

Accepted Answer

Anaerobic metabolism

Question 11

During the postabsorptive state, which of the following is NOT a primary source of energy?

Accepted Answer

Dietary carbohydrates

Question 12

Which of the following statements about creatine phosphate (PCr) is correct?

Accepted Answer

PCr provides phosphate to regenerate ATP from ADP during short, intense activities.

Question 13

Which equation correctly represents the conversion of ATP to ADP?

Accepted Answer

$ \mathrm{ATP} \rightarrow \mathrm{ADP} + \mathrm{P_i} $

Question 14

Which process is responsible for the formation of ketone bodies during prolonged fasting or low-carbohydrate diets?

Accepted Answer

Ketogenesis

Question 15

Which of the following statements about muscle glycogen is TRUE?

Accepted Answer

Muscle glycogen is used by muscle for energy and cannot be released into the bloodstream.

Question 16

Which metabolic pathway is responsible for the final stage of energy production, where most ATP is generated?

Accepted Answer

Electron transport chain

Question 17

A patient with untreated type 1 diabetes is at risk for which dangerous metabolic condition due to excess accumulation of ketone bodies?

Accepted Answer

Ketoacidosis

Question 18

Which of the following is a catabolic reaction?

Accepted Answer

Breakdown of triglycerides into fatty acids and glycerol

Question 19

Which hormone promotes fatty acid synthesis and inhibits lipolysis?

Accepted Answer

Insulin

Question 20

If a person consumes excess kilocalories from any macronutrient, what is the most likely fate of these excess calories?

Accepted Answer

They are stored as triglycerides via lipogenesis.

Question 21

During fasting, which process allows the body to maintain blood glucose levels by producing glucose from non-carbohydrate sources?

Accepted Answer

Gluconeogenesis

Energy Metabolism: Foundations and Pathways

Study Guide - Practice Questions