In a Laboratory Experiment You Have Treated a Muscle Cell

question 64

Multiple Choice

In a laboratory experiment you have treated a muscle cell with a calcium channel blocker.The membrane still depolarizes,but the concentration of calcium never increases in the cytosol.Which of the following describes what will happen next?

• A)Only one cross-bridge cycle will occur but no second cycle. 
• B)Binding of myosin to actin will take place.
• C)Tropomyosin will continue to cover the myosin binding sites on actin and no cross-bridges will form.
• D)A single twitch in skeletal muscle but no sustained contraction.
• E)Contraction will occur,but the muscle will be stuck in the contracted state and unable to relax.

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Definitions:

Learning Organisation

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The ongoing process of making adjustments and changes to respond to the environment or circumstances effectively.

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