Zara is an excellent violin player. which part of her brain is responsible for the motor skills involved in playing a violin

on Plato it’s cerebellum.

Explanation:

The only options it gave were thalamus, medulla oblongata, hypothalamus, and cerebellum.

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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it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).