Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence. Example: Large intestine, Stomach, Mouth, Small intestine, Oesophagus. Answer: Mouth → Oesophagus → Stomach → Small intestine → Large intestine.
Receptor, Spinal cord, Effector, Motor neuron, Sensory neuron.
Topic: Reflex arc
Answer
Receptor → Sensory neuron → Spinal cord → Motor neuron → Effector
This is the REFLEX ARC: RECEPTOR detects the stimulus SENSORY (afferent) neuron carries the impulse TO the spinal cord SPINAL CORD processes it MOTOR (efferent) neuron carries the instruction AWAY EFFECTOR (a muscle or gland) acts
THE WORDS THEMSELVES give the order: SENSORY relates to sensing, so it must follow the receptor; MOTOR relates to movement, so it must precede the effector.
The whole point of a reflex is that the SPINAL CORD completes the circuit without waiting for the brain — which is why you pull your hand from a hot object before you feel the pain.