1. “Everything psychological is simultaneously biological.”

2. Neurons Neurons communicate within our body to control all of our sensations, action, behaviors For a neuron to “turn on” it must reach THRESHOLD Threshold: a minimum amount of neurotransmitters must “ignite” the dendrite

3. Neurons detects

4. Neurons detects Cell body

5. Neurons Cell body

6. Neurons Cell body

7. Neurons Cell body

8. Neurons Cell body

9. Neurons

10.  Synapse Synapse  Space in between sending neuron & receiving neuron  Neurotransmitters Neurotransmitters  chemical messengers that cross the synaptic gaps between neurons.  Reuptake Reuptake  The terminal button recycles left over NT How Neurons Communicate https://www.youtube.com/watch?v=4OS2C4NemJI

11. How Neurons Communicate Reuptake

12.  Acetylcholine (AcH)  Dopamine  Serotonin  Norepinephrine  Endorphins Endorphins How Neurotransmitters Influence Us muscle & memory Alzheimer’s pleasure, too much = schizophrenia too little = Parkinson’s mood (happy), hunger, sleep too little = depression SSRI

13. #3. Explain how a neuron sends a message:

15. Objective 4: What are the functions of the nervous system’s main divisions? electrochemical communication network

16. The Nervous System

19. can be consciously overridden

20. The Nervous System

21. fight or flight opponent process homeostasis rest & digest

22. digestion slows