Assignment Brain Response of Behaviorappendix c

Assignment Brain Response of Behaviorappendix c - Axia...

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Appendix C Brain Response of Behavior 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 . 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. Neurons are not directly connected like links in a chain, they are separated by a tiny gap called a synaptic space or synaptic cleft. This is where the axon terminals of one neuron almost touch the dendrites or cell body of the neuron. When a neuron fires, an impulse travels down the axon, out through the terminal branches into a tiny swelling called a terminal button or synaptic knob. The entire area composed of the axon terminals of one neuron, the synaptic space, and the dendrites and cell body of the next neuron is called the synapse. When neural impulse reaches the end of the terminals it causes the vesicles to release varying amounts of chemicals called neurotransmitters into the synaptic space. Each neurotransmitter has specific matching receptor sites on the other side of the synaptic space. Neurotransmitters fit into the corresponding receptor site just as a key and lock system ensures that the transmitters do not randomly stimulate other neurons and follow an orderly pathway. Once there job is complete neurotransmitters detach from the receptor site. In most cases they are reabsorbed into the axon terminals to be used again, broke down and recycled to make new neurotransmitters, or disposed of by the body as waste. The synapse is cleared and returned to its normal state. Acetylcholine- Distributed widely throughout the central nervous system, where it is involved in arousal, attention, memory, motivation, and movement. Involved in muscle reaction through presence at neuromuscular junctions. . Dopamine- Involved in a wide variety of behaviors and emotions, including
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Assignment Brain Response of Behaviorappendix c - Axia...

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