Question

After birth, neurons reproduce at a rapid rate. When does the brain stop producing new neurons?

a. The brain stops producing neurons during adolescence.
b. The brain stops producing neurons after infancy.
c. The brain produces neurons throughout the lifespan.
d. The brain stops producing neurons in early adulthood.

Answer 1

New neurons are produced throughout a person's lifespan, primarily in the hippocampus, a brain structure involved in learning and memory. This process is known as neurogenesis and can be affected by exercise, stress, and certain medications.

Step-by-step explanation:

The question about when the brain stops producing new neurons relates to neurogenesis, which is the birth of new neurons. Contrary to the old belief that humans are born with all the neurons they will ever have, recent research has indicated that new neurons can be formed throughout a person's life. This process takes place in the hippocampus, a brain structure involved in learning and memory, where about 1,000 new neurons develop each day. Although most of these new neurons will die, the survival of new neurons has been positively correlated with learning tasks. Factors such as exercise and certain antidepressants promote neurogenesis, while stress inhibits it. Given this information, the correct answer is: c. The brain produces neurons throughout the lifespan.