What is the purpose of Koch's 4th postulate? Selected

Answers:
Identification of capsule forming cells
Test the candidate for infectivity
Test candidates to make sure most subjects develop disease
Monitor cell growth
No answers are correct
Ouestion 6

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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