Question 1

Which enzyme catalyzes the conversion of glucose to glucose-6-phosphate during glycogenesis?

Accepted Answer

Hexokinase

Question 2

During prolonged exercise, which of the following best explains the relationship between muscle glycogen concentration and fatigue?

Accepted Answer

Fatigue increases as muscle glycogen concentration decreases

Question 3

Which process is responsible for the synthesis of new glucose from non-carbohydrate sources, and where does it primarily occur?

Accepted Answer

Gluconeogenesis in the liver

Question 4

Which of the following is a substrate for gluconeogenesis?

Accepted Answer

Glycerol

Question 5

What is the role of glucose-6-phosphatase in glycogen metabolism?

Accepted Answer

It converts glucose-6-phosphate to glucose

Question 6

Which form of phosphorylase is active during glycogenolysis?

Accepted Answer

Phosphorylase a

Question 7

A patient with a deficiency in glucose-6-phosphatase would most likely have difficulty with which metabolic process?

Accepted Answer

Releasing free glucose from the liver into the blood

Question 8

Which equation best represents the driving force for passive transport of ions across a membrane?

Accepted Answer

$$F = zF(E_{in} - E_{out})$$

Question 9

During steady-state exercise, which of the following is true regarding energy expenditure (EE) and workload?

Accepted Answer

EE remains constant when workload is constant and steady-state is achieved

Question 10

Which of the following is NOT a product of amino acid catabolism for energy?

Accepted Answer

Glycogen

Question 11

Which metabolic pathway directly connects pyruvate to the Krebs cycle?

Accepted Answer

Conversion of pyruvate to acetyl CoA

Question 12

If a muscle cell is depleted of glycogen, which process must increase to maintain blood glucose levels during exercise?

Accepted Answer

Gluconeogenesis

Question 13

Which of the following statements about glycogen supercompensation is correct?

Accepted Answer

It occurs after prolonged exercise followed by carbohydrate loading during recovery

Question 14

Which of the following is a correct sequence of events in glycogen metabolism during exercise?

Accepted Answer

Glycogenolysis → Glucose-6-phosphate → Glycolysis

Question 15

Which of the following molecules can be converted into glucose via gluconeogenesis?

Accepted Answer

Lactate

Question 16

Which process is most important for maintaining blood glucose during fasting?

Accepted Answer

Gluconeogenesis in the liver

Question 17

Which of the following is true regarding the role of the liver in glucose homeostasis?

Accepted Answer

The liver stores glycogen and releases glucose into the blood when needed

Question 18

Which enzyme is responsible for removing the amino group from amino acids during protein catabolism?

Accepted Answer

Transaminase

Question 19

Which of the following best describes the fate of keto acids produced from amino acid catabolism?

Accepted Answer

They enter the Krebs cycle for ATP production

Question 20

Which of the following is a correct statement about the steady-state in exercise physiology?

Accepted Answer

Steady-state is a rare condition in sports, making calculations more complex

Glycogen Metabolism and Energy Pathways in Exercise Physiology

Guida di studio - Domande di pratica