Myelin - White, fatty substance that speeds up nerve impulses: _______ sheath, Sensory neuron - A neuron that detects stimuli from the internal or external environment and converts each stimulus into a nerve impulse., Homeostasis - Maintenance of a balanced internal state despite changes to surroundings., Motor neuron - a neuron that sends an impulse to a muscle or gland, causing the muscle or gland to react, Interneurons - CNS neurons that communicate between the sensory inputs and motor outputs, Stimulus - A change in an organism's surroundings that causes the organism to react, Response - An action or change in behaviour that occurs as a result of a stimulus., Synapse - A gap where information is transmitted from one neuron to the next., Somatic - Division of nervous system under voluntary control, Autonomic - Division of nervous system under involuntary control, Parasympethetic - Division of nervous system that relaxes heart rate and promotes digestion, Sympathetic - Division of the nervous system that prepares the body for physical activity, Reflex - Automatic and rapid response to stimulus that is usually protective., Brain - Part of the CNS that processes incoming information and coordinates responses, Central - _____ nervous system is made of the brain and spinal cord, Peripheral - _____ nervous system is made up of sensory and motor neurone,

(Year 9) Nervous System

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