Understanding Muscle Metabolism

During a biology class, Grace and Noah are discussing the primary difference between aerobic and anaerobic metabolism in muscles. What is the primary difference?

• Aerobic metabolism requires oxygen, while anaerobic metabolism does not.

• Anaerobic metabolism produces more ATP than aerobic metabolism.

• Aerobic metabolism occurs only in the liver.

• Anaerobic metabolism occurs only during sleep.

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Which of the following is the main energy currency used by muscles during contraction?

• Glucose

• ATP (Adenosine Triphosphate)

• Lactic Acid

• Creatine Phosphate

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During Priya's intense workout session, which byproduct accumulates in her muscles and contributes to fatigue?

• Carbon Dioxide

• Lactic Acid

• Water

• Oxygen

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What role does creatine phosphate play in muscle metabolism?

• It directly produces ATP from glucose.

• It stores energy that can be quickly converted to ATP.

• It breaks down lactic acid.

• It transports oxygen to muscle cells.

Which process is primarily responsible for ATP production during prolonged, low-intensity exercise?

• Anaerobic Glycolysis

• Aerobic Respiration

• Fermentation

• Phosphocreatine Breakdown

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How does regular exercise affect muscle metabolism over time?

• It decreases the efficiency of ATP production.

• It increases the number of mitochondria in muscle cells.

• It reduces the ability to use oxygen.

• It leads to a decrease in muscle mass.

What happens to the rate of ATP production as exercise intensity increases?

• It decreases because less oxygen is available.

• It remains constant regardless of intensity.

• It increases due to higher demand for energy.

• It stops completely during high-intensity exercise.

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Emma is studying biology and learns that the process of breaking down a glucose molecule to release energy is called ___________.

• Glycogenolysis

• Gluconeogenesis

• Glycolysis

• Hydrolysis

Benjamin is opening and closing clothespins as part of a lab activity. Benjamin begins to experience muscle fatigue, and the rate at which Benjamin is opening and closing the clothespins slows.

The fatigue Benjamin feels is due to

• a decrease of metabolic waste products in the

  muscles

• a decrease in the pulse rate of the student

• an increase in the pulse rate of the student

• an increase of metabolic waste products in the

  muscles

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After Samuel and Aria completed an intense workout session, their muscles felt sore because:

• the accumulation of NAD+

• the accumulation of lactic acid 

• the accumulation of ATP

• the accumulation of carbon dioxide

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