Which of the following best describes the impact on the brain across the life span of neuronal growth and loss?
A) After birth the brain develops no new neurons or synapses. The rate of loss is low for children, high for the elderly.
B) The rate of neuron and synapse gain and loss across the life span is about equal.
C) The brain gains and loses neurons and synapses across the life span, but initial gains outnumber losses. This ratio is gradually reversed with age.
D) Neuronal and synaptic loss is always greater than the gain.

Question

Quizplus · Accepted Answer

Research has shown that the brain does gain and lose neurons and synapses across the lifespan, with initial gains outnumbering losses. However, the ratio is gradually reversed with age, meaning that as we get older, we tend to lose more neurons and synapses than we gain.

Which of the Following Best Describes the Impact on the Brain