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Question

The drug Botox (botulinum toxin) is derived from a toxin produced by the bacterial species Clostridium botulinum. It is often used for cosmetic purposes to tighten skin and reduce the appearance of facial wrinkles. The toxin is an inhibitor of the enzyme acetylcholinesterase (AChase).
Which of the following processes is the botulinum toxin inhibiting by blocking the action of AChase?

A
The botulinum toxin is preventing blood flow to the facial muscles.
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B
The botulinum toxin is causing paralysis of the facial muscles.
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C
The botulinum toxin is pulling the skin taut by smoothing out the adipose tissue underneath.
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D
The botulinum toxin causes the muscles to alternately contract and relax.
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E
The botulinum toxin causes an excess of blood flow to the muscles.
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Solution

The correct option is A The botulinum toxin is preventing blood flow to the facial muscles.
The botulinum toxin prevents the release of acetylcholine from nerve the endings of the axon and cause flaccid paralysis. The toxin is used in cosmetics for treating wrinkles on face. It temporarily paralyzes the facial muscles and soothes them. The muscles regain their normal function after few months.
So, the correct answer is 'The botulinum toxin is preventing blood flow to the facial muscles'.

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