One of the Adaptations That Occur to Muscles Due to Exercise

question 62

Multiple Choice

One of the adaptations that occur to muscles due to exercise is that contractions become stronger and steadier over time even with no change in muscle mass. Which statement below best explains why muscle contractions may become stronger?

• A) Muscle fibers reflexively start generating force even before the motor neurons send action potentials.
• B) The skeletal muscle contraction is enhanced by an increased input from the sympathetic nervous system.
• C) The action potentials sent by the motor neurons get larger and last longer to produce more force in the muscles.
• D) More motor neurons are made so that more action potentials can be sent down to the muscles.
• E) Motor neurons are activated more rapidly to generate a stronger muscle contraction.

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Definitions:

Profits

The financial gain realized when the amount earned from a business activity exceeds the expenses, costs, and taxes involved in sustaining the activity.

Output

The total amount of goods or services produced by a company, industry, or economic system.

Marginal Costs

The additional cost incurred to produce an extra unit of a product or service.

Average Costs

The total costs of production divided by the number of units produced, representing the cost per unit.