Explain the limiting factors that control population growth

Competition - when space is full pack organisms compete for resources and the sooner the resources are gone. Predation - organisms feed on and kill animals lowering their population growth and the prey population growth, same as herbivore and human prey. Disease - again feeds on hosts. Stress from overcrowding - females could kill offspring. Hurricanes (density-independent limiting factors).

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explanation:

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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