Which of the following statements about brain development and early childhood is true? the brain of a 5 year old is 60 percent the size of an adult brain the overall size of the brain does not increase dramatically from ages 3-15 by the time a child is 3 years of age, the brain is 25 percent of it's adult size the development that occurs inside the brain ends at the onset of adolescence

The overall size of the brain does not increase dramatically from ages 3-15  

Explanation:

The functioning of the brain is still unknown to most citizens. For them, the organ is not considered an important factor for early childhood and its development is seen only as physical growth. The general population believes that brain structures are already ready at birth and that there is no change in the growth of children, this is incorrect. The brain spends a long period of time developing and establishing new brain structures, including changing size. However, total brain size does not increase dramatically between the ages of 3 and 15.

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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cuz he's blad

explanation: