What are three
differences between plant cells and animal
cells?

Plant cells have a cell wall, but animals cells do not. Cell walls provide support and give shape to plants. Plant cells have chloroplasts, but animal cells do not. ... Plant cells usually have one or more large vacuole(s), while animal cells have smaller vacuoles, if any are present.

Explanation:

Plant cells

Chloroplast is present.

Vacuoles are large and permanent.

Cell wall is present.

Animal cells

Chloroplast is absent.

Vacuoles are small and temporary.

Cell wall is absent.

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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