Which of the following events in a stretch reflex occurs last?
A)alpha motor neurons transmit action potentials to muscle causing contraction
B)muscle spindle detects stretch of muscle
C)afferent neurons conduct action potentials to the spinal cord
D)afferent neurons synapse with alpha motor neurons
E)muscle is stretched

Question

Quizplus · Accepted Answer

The last event in a stretch reflex is the contraction of the muscle, which is caused by the action potentials transmitted by alpha motor neurons. The other events occur in order as follows: 1) muscle is stretched, 2) muscle spindle detects stretch of muscle, 3) afferent neurons conduct action potentials to the spinal cord, and 4) afferent neurons synapse with alpha motor neurons.

Which of the Following Events in a Stretch Reflex Occurs