Facial wrinkles, such as glabellar or "frown" lines, appear with aging as a result of natural, repetitive muscle contractions. botox alleviate the appearance of these wrinkles by
a. relaxing the facial muscles that cause the wrinkles
b. overstimulating the facial nerves to produce a steady contraction of the facial muscles
c. destroying the motor nerves that serve the muscles responsible for forming the wrinkles
d. overstimulating the facial muscles to tighten their appearance

Botox alleviate the appearance of these wrinkles by relaxing the facial muscles that cause of the wrinkles

Explanation:

Botulinic toxin (botox) produces transitory denervation in neuromuscular junction which manifest in muscular paralysis on the muscles innervated by the autonomic nervous system. Especially, botox inhibits the action potential in neuromuscular junction in a preganglionar level and avoiding union of presynaptic membrane with presynaptic vesicle. Accordingly, botox avoids the liberation of acetylcholine producing flaccid paralyses in the muscle.

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