Describe the process by which botulinum toxin interrupts the crossbridge cycle.Provide other possible uses for this
toxin.
Indicate whether the statement is true or false.
ANSWER: The bacterium Clostridium botulinum, which grows in food stored improperly, produces
botulinum toxin that blocks acetylcholine release in neuromuscular junctions. These
muscles are therefore unable to contract. The toxin is used for cosmetic treatment of
wrinkles (the brand name for the product is Botox).
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