What Opens First In Response To A Threshold Stimulus?

What Opens First In Response To A Threshold Stimulus? What opens first in response to a threshold stimulus? Voltage-gated Na+ channels. The activation gates of voltage-gated Na+ channels open, and Na+ diffuses into the cytoplasm. … Voltage-gated Na+ channels change shape, and their activation gates open. What is the first change to occur in response

What Is Absolute And Relative Refractory Period?

What Is Absolute And Relative Refractory Period? Absolute: Is the period of time during which a second action potential ABSOLUTELY cannot be initiated, no matter how large the applied stimulus is. Relative: Is the interval immediately following the Absolute Refractory Period during which initiation of a second action potential is INHIBITED, but not impossible. What