1. Nervous System

2. How did our nervous system work in the Impulse Activity we just completed? How did our nervous system work in the Impulse Activity we just completed? –We sensed the touch. –A message was sent to our brain. –Our brain sent a message to our muscles. –Our muscles squeezed the hand.

3. Organs of the Nervous System Brain = uses information it receives from nerve impulses to coordinate actions

4. Organs of the Nervous System Nerves = carry messages throughout the body

5. Organs of the Nervous System Spinal Cord = Central communication system. – Nerve center – Messages are sent to the brain through the spinal cord. – Exception: Reflexes skip the spinal cord and go straight to the brain.

6. Functions of the Nervous System Functions include: –Control center –Communication network –Coordinates all actions and reactions –Send messages as electrical impulses

7. Functions of the Nervous System Functions include: –Allows us to Think Think Evaluate Evaluate Remember Remember

8. Functions of the Nervous System Functions include: 1. Sensory Input- Senses send messages to the brain. 2. Integration- The brain interprets and translates. 3. Motor Output- The brain sends messages to body.

9. Functions of the Nervous System Functions include: – – Central Nervous Maintains System- Maintains homeostasis by homeostasis by regulating vital body regulating vital body functions such as functions such as breathing, heart rate, breathing, heart rate, hormones, etc. hormones, etc.

10. Functions of the Nervous System Functions include: – Peripheral Nervous System- Sensory Neurons- Carry information toward the central nervous system Sensory Neurons- Carry information toward the central nervous system Motor Neurons- Send impulses away from the central nervous system Motor Neurons- Send impulses away from the central nervous system