Which correctly lists the sequence of structures that action potentials must move through to excite skeletal muscle contraction?
A)sarcolemma,axon of neuron,T tubules
B)T tubules,sarcolemma,myofilament
C)muscle fiber,axon of neuron,myofibrils
D)axon of neuron,sarcolemma,T tubules
E)myofibrils,myofilaments,mitochondria

Question

Quizplus · Accepted Answer

Action potentials must first move through the axon of a neuron to reach the neuromuscular junction, where they then stimulate the release of acetylcholine. This acetylcholine binds to receptors on the sarcolemma, which then initiates an action potential that travels down the T tubules and stimulates the release of calcium from the sarcoplasmic reticulum. This calcium then binds to myofilaments, which leads to muscle contraction.

Which Correctly Lists the Sequence of Structures That Action Potentials