The Nervous System

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The Nervous System

• Mr. Koch
• AP Psychology
• Forest Lake High School

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The Nervous System

• Central Nervous System (CNS)
• Includes all neurons in brain and spinal cord
• Peripheral Nervous System (PNS)
• Neurons (sensory and motor) that run to and from
  CNS
• Connects fingers, toes, etc. to spinal cord

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The Nervous System

• These systems work as connecting and coordinating
  systems b/w the sense organs, muscles and glands

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The Nervous System

• Somatic Nervous System (SNS)
• Transmits stimuli from your senses to CNS and
  from CNS to muscles
• Example feel a hot stove and pull hand away
• Autonomic Nervous System (ANS)
• (automatic)
• Regulates activities of vital organs
• Lungs, stomach, intestines, heart liver,
  eliminative organs, and reproductive organs
• We usually cannot voluntarily control these
  activities
• Exceptions hold breath, control blood pressure,
  blinking, sneezing

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The Nervous System

• 2 divisions of the ANS
• Sympathetic Nervous System
• Arouses us for defensive action mobilizes
  energy
• (? heartbeat, ? digestion, ? blood sugar)
• fight or flight response
• Parasympathetic Nervous System
• Calms us down conserves energy
• (? heartbeat, ? blood sugar, etc.)

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The Nervous System

• Types of Neurons
• (neuron nerve cell)
• Sensory (afferent) neurons
• Takes info up to brain
• (sense, intake)
• Interneurons
• Processes information
• (turnstile)
• Motor (efferent) neurons
• Controls the physical, motor response muscle
  skills
• (movement, out)

What happened? Perception? What should we do
about it?