#16 According to Craik and Lockhart (1972), the three levels of processing are , , and . A. sensory . . . shallow . . . deep
B. sensory . . . short . . . long
C. shallow . . . intermediate . . . deep
D. short . . . deep . . . long

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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where is the diagram?

if you insert the diagram ill be able to you

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.