1. TURN TO PAGE DIVIDE THE PAGE INTO 8 EQUAL BOXES 3. NUMBER THE BOXES 1-8 The Nervous System #1-Functions of the Nervous System 1. Communication and coordination Adapt and respond to changes from both inside and outside the body 2. Site of reasoning- your brain 3. Two main divisions Central nervous system (CNS): brain and spinal cord Peripheral nervous system (PNS)- the nerves Neuron- basic of the nervous system Dendrites- carry impulses towards the cell Axon-carry impulses away from the cell Myelin sheath-insulation Synapse-space between neurons Neurotransmitters-chemical messengers sent across the synapse #2-The Neuron #3-DCASN Dead Cats Always Smell Nasty Dendrites Cell body Axon Synapse Neurotransmitters Cerebrum-largest part of brain. Responsible for reasoning, thought, memory, speech, sensation, etc. Divided into two halves. #4-Brain Cerebellum- responsible for muscle coordination Brain stem- most basic functions; respiration, swallowing, blood pressure. Lower part (medulla oblongata) is continuous with spinal cord #4-Brain Spinal cord- begins at brain stem and ends at second lumbar vertebrae Contains both afferent (to the brain) and efferent (motor neurons- away from the brain) #5-Spinal Cord #6-Peripheral Nervous System Somatic system Conscious control Reflex arc Moving a hand Autonomic system Automatic (involuntary) fight or flight response heart rate goes up #7- Reflex Arc 1. Stimulus 2. Sensory Neuron 3. Interneuron 4. Motor Neuron 5. Impulse #8- Today I Learned In 6 complete sentences and 5 new vocabulary words, describe what you have learned about the Nervous System today. Highlight your words and write neatly!