The Body Can Control the Strength of Leg Muscle Contractions

question 13

Multiple Choice

The body can control the strength of leg muscle contractions when lifting a heavy object by increasing or decreasing the:

• A)frequency of action potentials sent to the leg muscles.
• B)number of thick and thin filaments involved in each sarcomere during contraction.
• C)number of calcium ions released by the sarcoplasmic reticulum.
• D)amount of ATP used by each active sarcomere during muscle contraction.

---

Definitions:

Retirement Account

A financial arrangement designed to replace employment income upon retirement, often offering tax benefits to encourage saving for the retirement years.

Retire

The process of leaving one's job and ceasing to work, typically due to age or health reasons.

Interest Rate

The percentage of a sum of money charged for its use, reflecting the cost of borrowing money or the return on invested funds.

Bond

A fixed income investment in which an investor loans money to an entity (typically corporate or governmental) which borrows the funds for a defined period at a variable or fixed interest rate.