What Would Result from a Lack of Extracellular Ca²⁺ at the Neuromuscular

Multiple Choice

What would result from a lack of extracellular Ca²⁺ at the neuromuscular junction?

A) Excessive synaptic vesicles would fuse and release too much ACh, overstimulating the myofiber.
B) Synaptic vesicles would fail to fuse and ACh would not be released.
C) Nothing would happen because extracellular Ca²⁺ does not play a role in muscle stimulation.
D) The neuron must use its intracellular Ca²⁺ to make the vesicles fuse.
E) Potassium ions are used in place of Ca²⁺ to ensure the vesicles fuse.