the rising phase, which ion channel is responsible for action potential returning to its resting Vm, and why? Na* channels, because positive Na* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise Vm Na channels, because positive Na* ions are at higher concentration inside the axon than outside, and so they leave the axon and raise Vm O K* channels, because positive K* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise V m K* channels, because positive K* ions are at higher concentration inside the axon than outside, and so they leave the axon and lower V.

True/False - The action potential is always the same size, regardless of the strength of excitatory signaling that a neuron is receiving.

Be able to describe the resting membrane potential of a neuron what is possibly happening versus what is actively happening to maintain negative -70mv

Part II. The parts of an action potential. The following is a diagram of an action potential in a neuron. | +40 Voltage (mV) -55 -70 Threshold 0 a. b. C. Stimulus 1 Action potential Depolarization Repolarization Failed initiations 2 3 Time (ms) Resting state Refractory period Between the stars, what would be the gating mechanism of the sodium channels if this was an olfactory receptor cell? Between the star and smiley, what types of channels are opening, AND what is their gating mechanism? Between the smiley and heart, gated channels open. gated channels close and