Why Do Individual Muscle Twitches Have to Be Added Together

question 60

Multiple Choice

Why do individual muscle twitches have to be added together, as in summation or tetanus?

• A) Only added twitches produce any muscle contraction: A fiber undergoing a muscle twitch does not contract at all.
• B) There has to be a critical mass of muscle twitches for calcium to be released into the muscle cell.
• C) Not enough acetylcholine will be produced for contraction without multiple twitches.
• D) Multiple twitches add up to an increase in muscle fiber tension, which increases the strength of the muscle.
• E) Not enough ATP is generated by one muscle twitch.

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Definitions:

Marginal Revenue

The additional income received from selling one extra unit of a product or service.

Fixed Costs

Costs that do not vary with the level of production or sales, such as rent, salaries, and insurance premiums.

Profit-Maximizing

A strategy firms adopt aiming to produce the quantity of goods or services that leads to the highest possible profit.

Average Variable Cost

The variable cost per unit of output, calculated by dividing total variable costs by the quantity of output produced.