Which of the following is NOT true of the patellar reflex?

a. It is processed in the hypothalamus.

b. It involves two neurons.

c. It is activated by a stretch receptor.

d. It controls a single reflex.

e. It includes a motor and a sensory neuron.

The correct answer is letter B.

Explanation: The Patellar Reflex is a monosynaptic reflex arc.

Interneuron does not make part of the pathway to contraction of the muscle. The sensory neuron synapses from a motor neuron in the spinal cord.

An effector is a muscle that receives the impulse from the motor neuron. In somatic reflexes, the effector is skeletal muscle. In autonomic (visceral) reflexes, the effector is smooth or cardiac muscle, or a gland.