1. Chapter 3 BIOLOGY AND BEHAVIOR

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

3. 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

4. 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

5. 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

6. 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

7. NEURON pg. 54