ATP Use Is Lower in Smooth Muscle Than in Skeletal

question 29

Multiple Choice

ATP use is lower in smooth muscle than in skeletal muscle in part because

• A) there is no sarcoplasmic reticulum calcium ATPase in smooth muscle.
• B) smooth muscle myosin does not require an ATP molecule for each cross-bridge cycle.
• C) smooth muscle myosin completes the cross-bridge cycle more slowly than skeletal muscle myosin does.
• D) calcium removal from the cytoplasm does not require ATP in smooth muscle.

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Definitions:

Short-Run Equilibrium

A state in which market supply and demand balance out at current prices, leading to an economic situation where no incentive exists for prices to change.

Allocative Efficiency

A state of resource distribution where it is impossible to make one individual better off without making someone else worse off.

Economic Profit

The difference between total revenues and total economic costs, including both explicit and implicit costs.

Industry

A sector of the economy composed of businesses and organizations involved in the production of goods or provision of services.