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CSU PSY 100 - Neuron

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PSYCH 100 1st Edition Lecture 4Outline of Last Lecture I. ExperimentationII. Experimental ResearchIII. Ethical Issues in ResearchOutline of Current Lecture I. Parts of NeuronII. Neural CommunicationIII. NeurotransmittersIV. Peripheral Nervous SystemV. The Endocrine SystemCurrent LectureI. Parts of NeuronA. Neuron- basic building block of nervous system, it’s purpose is to transmit information in brain and spinal codB. Soma- Cell body, life support of cellC. Dendrites- Receives information and transfers it to the somaD. Axon- Send informationE. Myelin Sheath-wrapped around axon for speed transmissionF. In between sending and receiving neurons is the synapse, which is the tiny space between the dendrites and the axon terminal.\II. Neural CommunicationA. Electrical Communication within one neuron- neurons fire then action potential travels down axon in its all or nothing firing.B. Chemical Communication between two neurons- at the synapse neurotransmitters release from vesticles, fit into dendrite like “lock and key”. Chemical neurotransmitters is like a domino effect, that is how neurons communicate.III. NeurotransmittersA. Chemical messengers can be absorbed by next dendrite or can reuptake (be reabsorbed into sending neuron)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.B. Acetylcholine Neurotransmitter- involved with movementC. Dopamine Neurotransmitter-has effect on emotions, or short lived feelings.D. GABA- Neurotransmitter- Is inhibitory, stops communication in synapse and may affect anxiety. Alcohol increases GABA activity.E. Serotonin- SSRIS class of antidepressants work on serotonin which affects mood o long lasting emotions.F. SSRIS- Selective Serotonin Reuptake Inhibitor-prozac- serotonin makes long term happinessIV. Peripheral Nervous SystemA. Somatic Nervous System- controls voluntary movements of skeletal musclesB. Autonomic Nervous System- controls self-regulated action of internal organs and glands.1. Sympathetic Nervous System- arousing2. Parasympathetic Nervous System- calmingV. The Endocrine System- hormone system made up of glandsA. Pituitary Gland- The “Master gland” controls all parts of endocrine system, tells other glands to secrete hormonesB. Secretes hormones through chemical messengers, made and release by glands into blood stream. Hormones affect tissues, such as the brain. C. Endocrine system is slower travel than nervous system, but has longer lasting


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