With respect to adolescence, biology determines: . neither its beginning nor its ending. b. its beginning, as well as its end. c. its end, but not its beginning. d. its beginning, but not its end.

option B

Adolescence is beginini as well as it ends.

Explanation:

Adolescence is a period in life that marks the beginning of puberty and end or termination of physical growth and development.

It is a stage of maturity in life, where physical growth occurs and change in cognitive thinking .

Adolescence is a period of transition between childhood and adulthood.

Adolescence had beginning and it has end.

d statement

explanation:

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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