Which of the following statements about signals travelling to the brain is TRUE?
A) A signal produced by an afferent neuron is sent to one or more interneurons before reaching the brain.
B) Information from the peripheral nervous system reaches the central nervous system via efferent neurons.
C) Interneurons are only found in the spinal cord.
D) Afferent fibres convey signal information much faster than efferent fibres.

Question

Quizplus · Accepted Answer

A signal produced by an afferent neuron is first sent to one or more interneurons in the spinal cord before reaching the brain. This is because the interneurons are responsible for processing and interpreting the incoming signal before transmitting it further to the brain.

Option B is incorrect as information from the peripheral nervous system (including sensory information) reaches the central nervous system via afferent neurons and not efferent neurons.
Option C is incorrect as interneurons are found not only in the spinal cord but also in other parts of the nervous system, including the brain.
Option D is incorrect as afferent fibres (also known as sensory fibers) typically conduct signals slower than efferent fibers (also known as motor fibers) due to the nature of their function.

Which of the Following Statements About Signals Travelling to the Brain