Life Science 15 Discussion 11/19/08 Causation Proximate causation: direct, physiological, and immediate motivation to do something Ex. Being hungry Ex. Desire for new stuff Ultimate causation: evolutionary big picture motivation to do something Ex. Satisfying hunger feeds me, provides me with energy, helps me live, and ultimately helps me make babies Ex. Buying new clothes and stuff I don?t need improves my appearance and helps me find a mate to make babies Axons Axon Diagram Action Potential When a signal is send down an axon, sodium rushes in and potassium rushes out At the terminal button, vesicles bind to the synapse and its nutrients are released To clean this up, vesicles break down If we want more stimulation Increase neurotransmitters (how ecstasy) Inhibits break down (?) Inhibit reuptake (how Prozac works) To make a diet drug More serotonin, the more satisfied we?ll feel, and we won?t eat Inhibit break down Inhibit reuptake
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