In pea plants, the gene for yellow peas (Y) is dominant and the gene for green peas () is recessive. What are the possible combinations of genes in the offspring of two yellow
heterozygous pea plants (Yy)?

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 enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation: