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Exam 3: Energy Systems and Exercise

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Question 41

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As exercise intensity increases, the percentage of energy from fat metabolism decreases.

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Question 42

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The purpose of beta-oxidation is to:

A) insure that oxidation-reduction reactions remain coupled.
B) stabilize unstable molecules in the mitochondria.
C) add oxygen molecules to the oxidative phosphorylation process as needed.
D) remove two-carbon segments from fatty acids and convert them to acetyl CoA.

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Question 43

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Most research has shown that short-term creatine "loading" results in an immediate increase in absolute, maximal power.

arrange the 4 energy sources named in order from the least to the greatest based on the amount of energy stored in the body: …..A…..B…..C…..D….. least greatest -Liver glycogen

Discuss the concept of the respiratory exchange ratio (RER) and how the proportions of fat and carbohydrate oxidation change as exercise intensity and/or duration changes.

Using the light dimmer analogy, explain the circumstances under which a backpacker would use each of the three major energy systems.

The elevated oxygen consumption during recovery from an exercise bout is called EPOC or:

Oxygen deficit and oxygen debt are interchangeable terms that describe the "lag time" that exists between the onset of aerobic exercise and the ability of the aerobic energy system to achieve its full capacity.

When alcohol (ethanol) is consumed the breakdown and metabolism of ethanol is the body's highest priority.

As exercise intensity increases, the percentage of energy from carbohydrate metabolism decreases.

Compare and contrast the three energy systems and give examples of physical activities, exercise, or sports in which each is the predominant energy system.

Beta-oxidation is a process associated with the breakdown of amino acids for energy.

Match the term with its definition. -refers to tissue breakdown

Why does the amount of ATP produced in skeletal muscle differ from the amount produced in other tissues?

The fastest and least complex energy system used to produce ATP is:

What is creatine phosphate (CrP) ?

Which of the following is a true statement regarding the function of creatine phosphate (CrP) ?

The terms Krebs cycle and the tricarboxylic acid (TCA) cycle are interchangeable.

The branched chain amino acids can be relatively easily metabolized by skeletal muscle but they are considered the least preferred fuel source when compared to carbohydrates and fats.

Describe the characteristics of the creatine phosphate, anaerobic glycolysis, and oxidative phosphorylation energy systems.