1. THE NERVOUS SYSTEM

2. HOW THE NERVOUS SYSTEM WORKS
RECEIVES INFORMATION
RESPONDS TO INFORMATION
MAINTAIN HOMEOSTASIS --
Keeping the body’s internal environment stable
when the external environment changes.

3. NEURONS SENSORY, INTERNEURON, MOTOR
A. SENSORY NEURONS -- picks up STIMULI from environment. The impulse travels to the -----
C. INTERNEURON -- found in the brain or spinal cord -- carries the impulse to the----
B. MOTOR NEURON -- sends impulse to muscle to RESPOND. A C B

4. NEURONS Dendrites Axon Movement of impulse
Carry impulses TOWARD cell body
Carry impulses AWAY from cell body
DENDRITE
Electrical charge is transmitted across SYNAPSE by CHEMICAL NEUROTRANSMITTERS.

5. DIVISIONS OF THE NERVOUS SYSTEM
CENTRAL NERVOUS SYSTEM
PERIPHERAL NERVOUS SYSTEM
Branches out from CNS and connects it with the rest of the body

6. THE BRAIN CEREBRUM, CEREBELLUM, BRAIN STEM
Divided into LOBES – frontal, parietal, temporal, occipital
SOME FUNCTIONS – reasoning, planning, speech, movement, orientation, visual perception, memory, empathy, impulse control
BRAIN STEM
breathing, heartbeat, and blood pressure.
Coordination of movement, posture, and balance

7. REFLEXES automatic response that occurs without conscious control
INTERNEURUON IN SPINAL COLUMN

8. REFLEX IN ACTION

9. SENSATIONAL SENSATIONS