beh225_appendix_c[1] - Axia College Material Appendix C...

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Axia College Material Appendix C Brain Response of Behavior BEH 225
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Part I Note: Parts II and III follow below, complete all three. Run Multimedias 2.3 and 2.4 o Go to the Web site www.prenhall.com/morris . o Click text: Psychology: An Introduction (12 th ed.) o Click “2” on the select a chapter tool bar. o Click Live!Psych on the left hand menu. o Select 2.3 and 2.4. Write a 350- to 700-word response to the following: Explain the communication process of neurons in the brain. List some common neurotransmitters and describe their effect on behavior. BEH 225
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The brain is a very complex organ within the body. So to begin, let us start with the central nervous system. There are two divisions of the nervous system. The first division is the central nervous system that includes the brain and the spinal cord. The second division includes the peripheral nervous system. The peripheral nervous system communicates to every part of the body via nerve cells. Nerve cells are controlled by the Reticular formation. This is a network of neurons located in the hindbrain, midbrain, and a part of the forebrain. The primary function of the reticular formation is to alert or arouse higher parts of the brain. Neurons communicate through the electrochemical process. As each neuron obtains a chemical message from a neighboring neuron, the dendrite (short fibers) transmits enough information to pass to the next neuron. When the neuron has enough information, a rapid electrical charge (action potential) travels down the axon to the terminal buttons. This releases neurotransmitters and sends the message to the next neuron. The synapse is the place where the nerve impulse is transmitted from cell to cell. There is a microscopic space between neurons; this space, named the synaptic cleft, is between the terminal button and the dendrites of the adjacent neurons. Each neuron has different sides, the presynaptic neuron is the sending side, the postsynaptic neuron is the receiving side. As messages are carried through each neuron, the neurotransmitters inside of synaptic vesicles serve as chemical messengers. Neurons come with receptor sites that bind the neurotransmitter molecules. Each receptor site only accepts the proper neurotransmitter molecule, so the synapse must contain the right terminal buttons to accept the molecule. Neurotransmitters communicate in two different ways: excitatory or inhibitory.
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beh225_appendix_c[1] - Axia College Material Appendix C...

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