An infant's responses to stimuli are coarse and undifferentiated because its nerve fibers
A) have not yet appeared.
B) are not yet capable of action potentials.
C) have not yet developed connections to the brain.
D) are not completely myelinated.
E) cannot release neurotransmitter.

Question

Quizplus · Accepted Answer

Nerve fibers in infants are not completely myelinated, meaning that they do not have a well-developed fatty coating around them that allows for efficient transmission of nerve impulses. As a result, their responses to stimuli are less precise and less differentiated than those of older infants, children, and adults.

An Infant's Responses to Stimuli Are Coarse and Undifferentiated Because