FREE CSCS: Bioenergetics of Exercise & Training Questions and Answers

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One of two routes is open to pyruvate molecules after anaerobic glycolysis. Which pathway will the pyruvate molecule take if the oxygen supply is scarce and the cell has high energy requirements?

Correct! Wrong!

Explanation:
Pyruvate will undergo lactic acid fermentation if the cell's energy requirements are high and the oxygen supply is low (anaerobic glycolysis). Pyruvate enters the Krebs Cycle when oxygen levels are adequate and energy requirements are low.

The body uses three different sorts of energy systems to produce energy. Which of the following does the body not employ as an energy system to replenish ATP in skeletal muscle?

Correct! Wrong!

Explanation:
One of the three energy mechanisms for regenerating ATP in skeletal muscle is not "aerobic." The oxidative system generates ATP using an aerobic method.

Rockey is a guy college student who is 22 years old. He runs for fun, but he wants to improve his time in a future 10-kilometer race. In order for him to train the proper energy system, what range of work-to-rest ratios will you suggest to him?

Correct! Wrong!

Explanation:
An activity of comparatively modest effort is a 10-kilometer race (compared to something high-intensity, like a 1RM back squat). Activities of low intensity lasting more than three minutes regenerate ATP through the oxidative system.

Which of the following regions houses the body's glycogen stores in a larger quantity?

Correct! Wrong!

Explanation:
The total amount of muscle in the body contains 00g to 400g of glycogen. In the liver, there is glycogen storage between 70 and 100 grams.

What is the name of the intensity level at which the blood lactate concentration abruptly rises above the reference value?

Correct! Wrong!

Explanation:
On the set of blood lactate accumulation occurs when blood lactate reaches 4mmol / L.

Lactic acid fermentation is the process where pyruvate is reduced by NADH. The reduced pyruvate molecule becomes lactate.

VO2 Max is the maximum amount of oxygen a body can use as measured in milliliters of oxygen per kilogram of body weight per minute.

The body uses three different sorts of energy systems to produce energy. Which of the three energy sources uses only anaerobic processes?

Correct! Wrong!

Explanation:
The phosphagen system doesn't need oxygen because it uses creatine kinase to regenerate ATP. The enzyme creatine kinase transfers a phosphate group from creatine phosphate to an ADP molecule. ADP (adenosine diphosphate) is transformed into ATP by adding another phosphate group (adenosine triphosphate).

How many acetyl CoA molecules can enter the Krebs Cycle from a single glucose molecule during glycolysis?

Correct! Wrong!

Explanation:
Fructose-1,6-bisphosphate is created during glycolysis from one glucose molecule. Fructose-1,6-bisphosphate, a 6-carbon molecule, is divided into two 3-carbon molecules. The three-carbon molecules go through glycolysis in different but identical pathways. Consequently, two molecules of pyruvate are produced, and these are followed by two molecules of acetyl CoA.

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