Explain how light waves bend/ refract use the word medium.

cancer   is   essentially   uncontrolled   mitosis   of specialized cells

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

read more on -

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!