Refer to the Graph Showing World Record Times for Running

question 62

Multiple Choice

Refer to the graph showing world record times for running events of different durations.Each colored band in the graph (labeled 1-3) corresponds to the time courses of the three energy systems that supply fuel to the muscles. During which time period(s) are mitochondria the main source of ATP for the runner's muscles?

• A) Time period 1, approximately 0-10 seconds
• B) Time period 1, approximately 0-30 seconds
• C) Time period 2, approximately 30-120 seconds
• D) Time periods 2 and 3, approximately 30-10,000 seconds
• E) Time period 3, approximately 120-10,000 seconds

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Definitions:

Contribution Margin

Contribution margin is the amount of revenue remaining after deducting the variable costs of producing a product, indicating how much contributes to covering fixed costs and generating profit.

Variable Costs

Costs that fluctuate based on the level of a business’s activity.

Total Direct Labor Cost

The total expenses incurred from labor directly involved in the production of goods or services.

Per-unit Cost

The cost associated with producing or acquiring a single unit of a product or service.