Which of the following must occur first in a reflex arc?
A)detection by receptor and delivery of stimulus
B)integration in the central nervous system (CNS)
C)delivery of motor response to effector
D)transmission from the primary motor cortex

Question

Quizplus · Accepted Answer

The first step in a reflex arc is the detection of a stimulus by a sensory receptor. This stimulus is then delivered to the central nervous system (CNS) for integration and processing before a motor response is generated and sent to the effector. Transmission from the primary motor cortex is not always involved in reflex arcs.

Which of the Following Must Occur First in a Reflex