lecture07nth - Left off here last time portal system Figure...

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Unformatted text preview: Left off here last time portal system Figure 7-16 Synergism non-additive effects of hormones Figure 7-18 Externally applied hormones (agonists or antagonists) affect feedback loops (corticosteroids such as prednisone) Figure 7-19 Figure 7-15 Figure 7-20a Figure 7-15 Figure 7-20b Figure 7-15 Figure 7-20c Externally applied hormones (agonists or antagonists) affect feedback loops Figure 7-19 afferent - to CNS efferent - from CNS Figure 8-1 What is special about a neuron? "excitable" - can generate and transmit electrical signals (so are muscle cells) overview of anatomy and terminology Figure 8-2 Graded potentials and action potentials • Nernst equation - one ion • Goldman-Hodgkin-Katz - all ion concentrations (for calculating membrane potential) Ions that help generate electrical signal in neurons ("action potential") from Nernst 61 log [ion]out Eion = 10 z [ion]in Graded potential Figure 8-7 Graded potential Voltage in trigger zone (axon hillock in efferent neurons) will "trigger" action potential if > threshold Figure 8-8b We Walk through steps in action potential transmission - voltage-gated Na+ and K+ channels will open and close at different times Time (msec) Figure 8-9 ...
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This note was uploaded on 12/01/2010 for the course BIO SCI Bio Sci E1 taught by Professor Catherineloudin during the Spring '10 term at UC Irvine.

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