What is the direct stimulus that allows for calcium release inside muscle?
a. acetylcholine binding to its receptor on the sarcolemma
b. acetylcholine secretion from the axon terminal of a somatic motor neuron
c. action potentials conducting to the axon terminal of a somatic motor neuron to activate gated calcium channels
d. sodium diffusion into the sarcoplasm to generate a motor end plate potential
e. activation of voltage gated channels by an action potential that conducted into a transverse tubule of the sarcolemma