Central nervous system - Part of the nervous system made up of the brain and spinal cord., Peripheral nervous system - Part of the nervous system that consists of all of the nerves of the body., Neurons - Nerve cells. They carry electrical messages from one area of the body to another area., Stimulus - A sensation felt by sensory receptors (sound, light, pain, temperature, etc...) that elicits a response, synapse - A gap or space between two neurons where a chemical message is passed., spinal cord - Long bundles of neurons that run through the spine., sensory neuron - Neurons that carry incoming information from the sensory receptors to the brain and spinal cord., motor neuron - Neurons that carry outgoing information from the brain and spinal cord to the muscles and glands., reflex - An automatic response to a sensory stimulus, does not involve the brain, nervous system - the network of nerve cells and fibers that transmits nerve impulses between parts of the body., myelin sheath - covers the axon of some neurons and helps speed neural impulses, Effector - An organ (a gland or muscle) that becomes active in response to nerve impulses., reaction time - the amount of time taken to respond to a specific stimulus, sensory receptors - Specialized cells unique to each sense organ that respond to a particular form of sensory stimulation., neurotransmitter - chemical messengers that cross the synaptic gaps between neurons, axon - part of a neuron that is a thin fibre that conducts electrical impulses along the neuron,

Nervous System Key Terms

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