Welcome to Westonci.ca, your one-stop destination for finding answers to all your questions. Join our expert community now! Explore a wealth of knowledge from professionals across various disciplines on our comprehensive Q&A platform. Discover in-depth answers to your questions from a wide network of professionals on our user-friendly Q&A platform.

When an action potential arrives at an axon terminal at a neuromuscular junction, it causes the opening of _______ channels, increasing the concentration of this ion within the cell, which ultimately triggers fusion of neurotransmitter vesicles with the presynaptic cell membrane.