EXPLORING THE BODY SYSTEM BY SYSTEM: NERVOUS SYSTEM: (page 146-151, 94) FUNCTION: -_________________ and ___________________ the actions of all organs and organ systems. To _________, ____________ and ________________ to changes in external and internal environments. In short: Monitors and responds to stimuli in the environment. 1. The nervous system is mainly made up of _________________ tissue. These specialized cells are called __________________________. It’s job is to ___________ and _____________________ messages. 2. The part of the neuron that receives impulses is called the _________________. The impulse or message is passed to the neighboring dendrite by the __________. The gap between the dendrites of one neuron and the axon endings of another neuron is called a synapse. 3. Label the following neuron. 4. The nervous system consists of two parts. a. The central nervous system made up of the _____________________ and __________________ ____________________. b. The peripheral nervous system made up of the ___________________ and __________________ nerves. 5. Label the diagram using red for the central system and blue for the peripheral system. THE CENTRAL NERVOUS SYSTEM: Parts of the brain -The largest part of the brain is the ___________________ and it controls _____________________, _____________________ or _________________________________ -the _________________________ part controls balance, posture and coordination. -the __________________________ or brain stem controls digestion, heartbeat and ___________________________________. 6. THE PERIPHERAL NERVOUS SYSTEM: The peripheral nervous system is divided into two types of neurons. a. The ____________________ neurons carry information from body to the central nervous system. b. The __________________ carry information the central nervous system to the muscles or organs. 7. The peripheral nervous system can be either a. ___________________nervous system: where you have conscious control over your responses to stimuli, like _______________________________________________. b. ____________________nervous system: an unconscious response to stimuli. Known as an automatic response (you do not think about it) is controlled by the __________________ nervous system like __________________________________. 8. Explain the reflex response. Why is it important to have?