Practice question

The correct answer is C: Voltage-gated Ca2+ channel. In Synapse, this idea is central because it matches how the body actually works in everyday teaching examples. Put simply, excitable-cell physiology turns on membranes, ions, and signalling steps, and Voltage-gated Ca2+ channel captures the correct piece of that story. That is why Voltage-gated Ca2+ channel is the option that holds up when you check it against basic physiology. When you revise, say the answer out loud with one short reason attached; that sticks better than rote lists. Remember that physiology questions reward precise language: name the process, the location, and the outcome, then match that to the option text.