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The Nervous System Student Notes Nervous System: A. The nervous system _________________ all of the activities of the body. B. The nervous system is made of: 1. ________________________ 2. ________________________ 3. ________________________ 4. ________________________ C. The nervous system also allows you to react to a _________________. 1. A stimulus - ________________________________________________________________ 2. Example: _________________________________________________________________ D. Your reactions are _____________________ 1. Automatic means that you do _____ have to __________ about your reactions. 2. Example: If a bug flies by your eye, you will _____________ Central Nervous System: A. The Central Nervous System is made of the ________________________________ B. The Central Nervous System controls _________________ in the body. C. ____________ - An organ that controls your emotions, your thoughts, and every movement you make. D. ______________________ - The spinal cord sends messages to the brain The spinal cord is the part of the nervous system that connects the _________ to the rest of the nervous system. E. The___________________ - are the many _________ protect the nerves in the spinal cord. Outer Nervous System: A. The Outer Nervous System is made of the ________________ (NEURONS) and the ____________organs. Anatomy of a Neuron: A. ________________________ : functional portion B. ____________________: short extensions that receive signals C. ___________________ : long extension that transmits impulses away Sense Organs: A. B. C. D. Sense organs carry _________________ about the environment to the central nervous system. 5 sense organs: _________________________________________________________________ The environment is everything _____________________ the body. The sense organs gather information from outside the body, then send the messages to the _________________. Vision: A. Vision is _____________________________________________________________ B. Vision involves the _________ and the brain. Hearing: A. When a ________________ is made, the air around the sound ______________________. B. Hearing starts when some of the sound ___________ go into the _________. Touch: A. The sense of touch is located in the ________________. B. The nerves in the skin allow us to feel ______________________________________________. C. ________________ is how something feels. Smell: A. The ________________ controls your sense of ___________________. B. The nose is able to smell ________ different kinds of smells. Taste: A. Your sense of taste comes from the taste ______ in the ___________________. B. Taste buds are the parts on the tongue that allow us to _______________. C. The four kinds of taste buds are _______________________________________________________________________.