Which is the mrna made during transcription of the following dna template?

-g-c-t-t-a-g-t-c-c-a-t-t-

a. -c-g-a-a-u-c-a-g-g-u-a-a-
b. -c-g-u-u-t-c-u-g-g-t-u-u-
c. -c-g-a-a-t-c-a-g-g-t-a-a-
d. -c-g-t-t-u-c-t-g-g-u-t-t-

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.  

read more on -

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d