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Nervous System

Explore the complex process of chemical synapses, neurotransmitter function, and the impact of addiction on neural pathways. Learn about specific neurotransmitters like serotonin and dopamine, their roles, and effects on behavior. Discover how cocaine addiction disrupts synaptic communication and neurotransmitter regulation.

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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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