Which Neuron Delivers Sensations to the CNS

Question

Which neuron delivers sensations to the CNS?
A) first-order
B) second-order
C) third-order
D) fourth-order
E) sensory receptor

Accepted Answer

First-order neurons are responsible for delivering sensory information from the peripheral nervous system (PNS) to the central nervous system (CNS). They have receptors that detect stimuli and then transmit signals through their axons to the spinal cord or brainstem. Second-order neurons receive information from the first-order neurons and relay it to higher areas of the brain for processing. Third-order neurons carry information from the thalamus to the appropriate sensory cortex for interpretation. Fourth-order neurons are present only in specific areas of the brain and are responsible for complex processing of sensory information. Sensory receptors are specialized cells that detect stimuli and initiate a chain of events leading to the generation of neural signals in the first-order neurons.