| The Nervous System �Review Sheet
Key concepts: � The nervous system receives and relays information about activities within the body and monitors and responds to internal and external changes. � Neurons transmit messages in the form of electrical signals known as impulses. A neuron consists of a cell body, dendrites, an axon, and axon terminals. � The human nervous system is divided into two major divisions: the central nervous system and the peripheral nervous system. Key words: neuron motor neuron receptor impulse interneuron effector resting potential myelin Na-K pump action potential synapse central nervous system sensory neuron neurotransmitter peripheral nervous system reflex arc Diagrams: Be able to label and identify. parts of the eye: parts of the brain: cornea cerebral cortex lens medulla retina cerebellum iris brainstem pupil thalamus vitreous humor hypothalamus optic nerve blind spot Questions: 1) What is the difference between sensation and perception? 2) What is an �All � or � None� response? 3) How come impulses are unidirectional (only go in a certain direction on the neuron)? 4) How do the sodium-potassium pumps work? Significance? |