Biology for IGCSE & O level - Coordination And Response (Section 4 - No. 37)
What is the correct sequence of the events in a simple reflex arc?
Receptor -> Sensory neuron -> Relay neuron -> Motor neuron -> Effector
Effector -> Motor neuron -> Relay neuron -> Sensory neuron -> Receptor
Receptor -> Motor neuron -> Relay neuron -> Sensory neuron -> Effector
Effector -> Sensory neuron -> Relay neuron -> Motor neuron -> Receptor
Explanation
The stimulus is detected by a receptor, triggering a sensory neuron. This signals a relay neuron, which signals a motor neuron to the effector.
Comments (0)
