The patellar tendon or "knee jerk" reflex is an example of a _________ reflex.
A) withdrawal
B) flexion
C) monosynaptic
D) polysynaptic

Question

Quizplus · Accepted Answer

The patellar tendon reflex is a monosynaptic reflex, meaning it only involves one synapse between the sensory neuron and the motor neuron in the spinal cord. This reflex involves the stretching of the patellar tendon, which activates the muscle spindle receptors and sends a signal to the spinal cord through the sensory neuron. The sensory neuron synapses directly onto the motor neuron, and the motor neuron sends a signal back to the quadriceps muscle, causing it to contract and extend the leg.

The Patellar Tendon or "Knee Jerk" Reflex Is an Example