Botulinus toxin causes paralysis by preventing the exocytotic release of acetylcholine from the synaptic vesicles.Which of the following events would still occur in a tissue treated with this toxin?

Question

Quizplus · Accepted Answer

Botulinus toxin prevents the exocytosis of acetylcholine from the synaptic vesicles, but it does not affect the ability of calcium ion channels in the pre-synaptic membrane to open and allow calcium ions to enter the neuron. This is necessary for triggering the release of acetylcholine, but it is not directly affected by the toxin. Choices B, C, D, and E are all incorrect because they require the release of acetylcholine and subsequent muscle contraction, which are directly inhibited by botulinus toxin.

Botulinus Toxin Causes Paralysis by Preventing the Exocytotic Release of Acetylcholine