1. The Nervous System

2. Function – to coordinate and control body’s activities = regulation.
Allows body to respond to stimuli
Structures
1. Central Nervous System:
- brain
- spinal cord
2. Peripheral Nervous System
- nerves leading away from cns

4. Nerve Cells - Neurons

5. 3. Interneurons – connect sensory and motor neurons
3 types of neurons:
1. Sensory – carry impulses from sense organs to brain and spinal cord
2. Motor – carry impulses from brain and spinal cord to muscles and glands
3. Interneurons – connect sensory and motor neurons

6. Nerve impulse transmission

7. Stimulus – Response Pathway

8. Effects of Drugs on the Nervous System
Stimulants – increase the release of some neurotransmitters in the brain.
- afterwards there is a lack of neurotransmitters and feeling of depression

9. Antidepressants – some work by blocking neurotransmitter receptors so the signal will not be transmitted.