Discussion:
Membrane Potentials, Calcium and Muscle Contraction
1. Explain, briefly, why the 10-fold difference in concentration of Na+ across the membrane is important to excitable membranes.
2. How do voltage-gated calcium channels relate to electrical activity of the neuronal vs. sarcolemmal membrane? Concentrate on the differences. Keep your answer brief (3-4 sentences).
3. Why are muscle action potentials only the result of excitation? Think about what hyperpolarization would do for contraction.
Write your answer/response in detail with examples and facts and figures using APA style of formatting, size 12, font Times new roman and answer must be single spaced