Chapter 3 BIOLOGY AND BEHAVIOR

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Presentation transcript:

Chapter 3 BIOLOGY AND BEHAVIOR https://www.youtube.com/watch?v=1sCh6blHuVw

Neurons=nerve cells Quiz on Wed.! Sends and receives messages from other structures of the body, such as muscles and glands

Parts of neurons: Dendrites- branch out from cell body Thin fibers that receive information from other neurons and pass the message through the cell body Cell body – produces energy that fuels the activity of the cell Axon- carries messages away – varies in length

Myelin- white fatty substance that insulates and protects the axon – helps speed transmission of the message Axon terminals- end of axon, smaller fibers branching out Synapse- junction between the axon terminals of one neuron to the dendrites of another neuron

How messages travel through a neuron: Travel in only one direction Messages received by dendrites, travel through cell body and the axon to axon terminals, they cross the synapse to the dendrites of another neuron

Neurotransmitters- chemicals that are stored in sacs in the axon terminals Involved in everything we do Too much or too little results in disorders Dopamine- involved primarily in motor behavior- deficiency plays a role in Parkinson’s disease – excess results in schizophrenia

NEURON pg. 54

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