Which of the Following Statements About Excitation -Contraction Coupling in Skeletal

question 93

Multiple Choice

Which of the following statements about excitation -contraction coupling in skeletal muscle is FALSE?

• A) Calcium binds to troponin, causing a shift in tropomyosin, thereby exposing the binding sites on actin for myosin.
• B) DHP receptors on the T tubules detect changes in voltage and communicate to ryanodine receptors on the sarcoplasmic reticulum to open calcium channels.
• C) An end -plate potential triggers an action potential on the sarcolemma.
• D) An action potential in the sarcolemma stimulates the opening of voltage -gated calcium channels in the plasma membrane and the sarcoplasmic reticulum.
• E) Calcium ATPases in the sarcoplasmic reticulum are necessary for relaxation of the muscle.

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Definitions:

Tax Imposed

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Supply of Labor

The sum of hours employees are prepared and available to work at a specified rate of pay, within a certain timeframe.

Monopsony

A market condition where there is only one buyer for many sellers, giving the buyer significant control over prices and terms.

Labor Supply Curve

A graphical representation showing the relationship between the number of hours worked by individuals and the wage rate, indicating how many hours they are willing to work at a given wage.