A student investigated the effect of temperature on the activity of human amylase. This is the method used.
Why did the student leave the start he and amylase solutionin the water bath for 5 minutes?

cardiovascular system

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answer; the correct answer is desert plants;

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.  

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