What Is the Mechanism by Which OnabotulinumtoxinA (BOTOX)decreases Muscle Activation

question 7

Multiple Choice

What is the mechanism by which onabotulinumtoxinA (BOTOX) decreases muscle activation?

• A)Blocks the binding of acetylcholine (ACh)to the motor end plate.
• B)Inhibits the binding of myosin to active sites on actin.
• C)Blocks the release of Ca⁺² from the sarcoplasmic reticulum.
• D)Inhibits the release of ACh from the presynaptic terminal.
• E)None of the above occurs.

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