Cell membrane potential
© 2012 Pearson Education, Inc. Nervous system All organisms must sense and react to their environment Hydra – simplest nervous system with a nerve net.
1 5. Chemical basis of action potentials a. Sodium hypothesis: (Hodgkin and Katz, 1949) [Na + ] e reduction affects a.p., not E M Proposed Na + hypothesis:
Chapter 7 – Peripheral Nervous System
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