How do the actions of each neurotoxin act to block nervous stimulation of the muscular system?
Neurotoxins like botulinum toxin block the release of acetylcholine, a neurotransmitter necessary for muscle contraction, leading to muscle paralysis. Tetanus toxin, on the other hand, inhibits the release of inhibitory neurotransmitters, causing muscles to contract uncontrollably. Both toxins disrupt normal nervous stimulation of the muscular system, resulting in paralysis or spasms.