Nerve impulses travel more slowly in babies than in older children and adults because:
A) dendrites have not yet developed spines in infants.
B) the myelin sheaths on axons are not yet fully developed in infants.
C) the infant does not have as many synaptic connections.
D) axons are much shorter in infants.

Question

Quizplus · Accepted Answer

Myelin sheaths play an important role in increasing the speed of nerve impulses by allowing them to jump along the axons. Since the myelin sheaths are not fully developed in infants, their nerve impulses travel more slowly.

Nerve Impulses Travel More Slowly in Babies Than in Older