The sensory neuron that carries a sensation to the CNS is a ________ neuron.
A)receptor
B)first-order
C)second-order
D)third-order
E)fourth-order

Question

Quizplus · Accepted Answer

A first-order neuron carries sensory information from the periphery (receptors) to the spinal cord or brainstem. Receptor neurons are specialized cells that detect stimuli and transduce them into electrical signals, but they are not considered part of the sensory pathway. Second-order neurons carry sensory information from the spinal cord or brainstem to the thalamus, while third-order neurons carry information from the thalamus to the sensory cortex. Fourth-order neurons are not typically recognized as a distinct category in the sensory pathway.

The Sensory Neuron That Carries a Sensation to the CNS