Question

based on the information in table 1, the student investigates a classmate’s patellar reflex. after watching the reflex in action, the student starts to develop a new model to show this information. which pathway should the student’s model show that the signals in this reflex follow?
a. knee strike → muscle

b. knee strike → nerve → muscle

c. knee strike → spinal cord → nerve → muscle

d. knee strike → nerve → spinal cord → nerve → muscle

Explanation:

The patellar reflex involves a reflex arc. Sensory receptors detect the knee strike, send signals via a sensory nerve to the spinal cord. Then, a motor nerve from the spinal cord sends signals to the muscle. So the pathway is Knee strike → nerve (sensory) → spinal cord → nerve (motor) → muscle, matching option D.

Answer:

D. Knee strike → nerve → spinal cord → nerve → muscle