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Adipose Tissue Functions and Glucose Metabolism

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Adipose Tissue Functions and Glucose Metabolism

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Questions and Answers

What is the primary energy source for cardiac muscle?

Fatty acids (correct)

Glycogen

Amino acids

Glucose

What is the purpose of the Cori cycle in the muscle?

To produce ATP via oxidative phosphorylation

To increase mitochondrial density in the muscle

To restore muscle glycogen concentrations (correct)

To increase the delivery of oxygen to the muscle

What is the primary difference between slow-twitch and fast-twitch muscle fibers?

Slow-twitch fibers have more mitochondria and use oxidative phosphorylation, while fast-twitch fibers have fewer mitochondria and use glycolysis. (correct)

Slow-twitch fibers are primarily found in the cardiac muscle, while fast-twitch fibers are primarily found in the skeletal muscle.

Slow-twitch fibers produce more force and are used for endurance activities, while fast-twitch fibers produce less force but are used for high-intensity, short-duration activities.

Slow-twitch fibers have fewer blood vessels and rely more on anaerobic metabolism, while fast-twitch fibers have more blood vessels and rely more on aerobic metabolism.

How does endurance training affect the muscle?

It increases the number of mitochondria in the muscle. Signup and view all the answers

What is the purpose of the 'O2 debt' that occurs after vigorous exercise?

To replenish ATP stores in the muscle via oxidative phosphorylation. Signup and view all the answers

What is the main difference between cardiac muscle and skeletal muscle in terms of metabolism?

Cardiac muscle has more mitochondria and is primarily fueled by fatty acids, while skeletal muscle has fewer mitochondria and is primarily fueled by glucose. Signup and view all the answers

What is the purpose of the Cori cycle in the context of muscle metabolism?

To convert lactate produced during anaerobic glycolysis in the muscle back into glucose in the liver. Signup and view all the answers

How does the metabolic profile of slow-twitch and fast-twitch muscle fibers differ?

Slow-twitch fibers have a higher density of mitochondria and rely more on oxidative phosphorylation, while fast-twitch fibers have a lower density of mitochondria and rely more on anaerobic glycolysis. Signup and view all the answers

What is the primary function of the Cori cycle in the context of muscle metabolism?

To convert lactate produced during anaerobic glycolysis in the muscle back into glucose in the liver. Signup and view all the answers

How does endurance training affect the metabolic profile of muscle tissue?

Endurance training increases the number of mitochondria in the muscle, enhancing the capacity for oxidative phosphorylation. Signup and view all the answers