Stimulus, a change in the environment, CNS, the brain and spinal cord, Neurone, a nerve cell, Sensory neurone, carries impulses to the CNS, Motor neurone, carries impulses to an effector, Effector, a muscle or gland, Receptor, detects a stimulus, Reflex arc, pathway for a reflex action, Synapse, junction between two neurones, Homeostasis, balancing internal conditions

Nervous system

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