The Sensory neuron is the structure that first receives an impulse triggered by the stimulus. Thus, the correct option is D.
Sensory neurons may be characterized as nerve cells that are activated by sensory input or external stimulus from the environment.
When a person touches a hot object and immediately moves her finger away from it. This is because sensory neurons are activated by an external stimulus, which is sent to the central nervous system of the body, and a motor response is sent out to the skeletal muscles that regulate this movement.
Therefore, the correct option for this question is D.
To learn more about Sensory neurons, refer to the link:
https://brainly.com/question/13061744
#SPJ2
