The Nervous System Collects and responds to information – internal and external to the body.

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Presentation transcript:

The Nervous System Collects and responds to information – internal and external to the body

Two Parts CNS & PNS

Peripheral Nervous System (PNS) Nerves and supporting cells Collects information about the body’s internal and external environment

Peripheral Nervous System Somatic Autonomic

Neurons are Nerve Cells

Central Nervous System Brain and spinal cord Processes information and creates the response

Myelin insulates the nerve cells

Right brain / Left brain

* Be able to identify *

Phineas Gage

Nerves communicate via synapses neurotransmitters

Transmissions are electrochemical Synapse is the space between nerve cell endings Neurotransmitters are the chemicals that relay the message

Meth, alcohol, nicotine and opiates increase the release of dopamine – the body reacts by decreasing dopamine receptors.

Dopamine receptors in the Limbic Region (pleasure center)