Reflexes Can Be

Question

Reflexes can be
A) a single neuron
B) two neurons
C) three neurons
D) both b and c above

Accepted Answer

Reflexes can involve two or three neurons. A simple reflex, such as the knee jerk reflex, involves a sensory neuron and a motor neuron. A more complex reflex, such as the withdrawal reflex, may involve a third neuron in a relay between the sensory and motor neurons. Therefore, both choices B and C are correct, making D the best choice.