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Nervous System

Nervous System . Group 2 Reid Alex John. Chemical Synapse. Narrow cleft between presynaptic neuron and a postsynaptic cell. Molecules of neurotransmitter diffuse across it. [3] Or, the space between a neuron and a cell for signal molecules to pass through. Neurotransmitter.

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Nervous System

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  1. Nervous System Group 2 Reid Alex John

  2. Chemical Synapse • Narrow cleft between presynaptic neuron and a postsynaptic cell. Molecules of neurotransmitter diffuse across it.[3] • Or, the space between a neuron and a cell for signal molecules to pass through.

  3. Neurotransmitter • Communicate a signal between neurons, from the presynaptic cell to the postsynaptic cell by docking to presynaptic cell and released by electric pulse [2] • Help transmit electrical signals as chemical signals

  4. Chemical Synapse video • Sweet Vid.

  5. Transport • Proteins in postsynaptic cell • Exocytosis from presynaptic cell to synapse • Presynaptic cell re-uptakes used neurotransmitters using protein pumps

  6. Specific Neurotransmitters • Serotonin-GI tract, Central Nervous system • Changes behaviors based on resources • Gut reactions (food) • Dopamine-located in the mid-brain • Natural pain-killer • Social well-being • Reward motivation

  7. Cocaine Addiction [1] • Symptoms: depression, anxiety, pain, craving • Cocaine’s influence: binds to dopamine transport proteins • Prevents reuptake of dopamine • Constant signals so dopamine production slows. Cocaine eventually wears off. • Also kills receptors on postsynaptic cell

  8. References • Works Cited • Erickson, Carl. "Understanding Addiction." The University of Texas at Austin - Web Central. The University of Texas. Web. 05 Nov. 2010. <http://www.utexas.edu/research/asrec/dopamine.html>. • "Neurotransmitter Definition - Medical Dictionary Definitions of Popular Medical Terms Easily Defined on MedTerms." Medterms.com. Web. 05 Nov. 2010. <http://www.medterms.com/script/main/art.asp?articlekey=9973>. • Starr, Cecie, and Ralph E. Taggart. Biology the Unity and Diversity of Life. United States: Thomson Brooks/Cole, 2006. Print.

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