PSYC 100 Study Guide - Midterm Guide: Resting Potential, Positron Emission Tomography, Sensory Neuron
1 Mar 2016
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Document Summary
Ch 3: of information between and within neuron proceeds in two stages: Action potential occurs when there is a change in the membrane channels: when the threshold (-55mv) the k+ channels close and channels for. Na+ open increasing the positive charge inside the neuron. This pushes the potential to a max value of +40mv. There is a pump that moves na+ out of axon and moves k+ inside the axon that restores balance between inside and outside the axon: action potential regenerate at different points down the axon. Skipping method more efficient than above: presynaptic neuron"s axon end in terminal buttons. Synaptic vesicles contain neurotransmitters: postsynaptic neuron"s dendrites contain receptor cells. Birth: connections among neurons proliferate (form more branches and more neural networks) Womb: number of neurons grows by 75,000 new cells per minute in mid trimester. Infancy: growth in neural connection takes place initially in less complex parts of brain. Childhood: neural connections proliferate in the association areas.
