1. Ch. 6
Sec. 1
How the
Nervous System
Works

2. Functions of
the nervous
system:

3. 1. Receives info.

4. 2. responds to info.
• Stimulus- any change or
signal in environment
that can make an
organism react
• Response- what your
body does in reaction to
stimulus

5. 3. maintains
homeostasis

6. neuron
• nerve cell
• carries info. thru. nervous
system

7. carry impulses
 cell body
carry impulses away
from cell body

8. nerve impulse
•message that neuron
carries

9. Path of a nerve
impulse

10. 3 kinds
of
neurons
1. 3.
2.
sensory motor
interneuron
neuron neuron

11. 1.sensory neuron
•picks up stimuli 
nerve impulse

12. 2. interneuron
•carries nerve impulses
from neuron neuron

13. 3. motor neuron
•sends impulse to
muscle or gland

14. synapse
•junction where 1
neuron can transfer an
impulse  another
structure (neuron,
muscle, gland, etc.)

15. gap at a synapse = river
nerve impulse = General Lee car