Kinesiology 2230A/B Lecture Notes - Lecture 25: Epimysium, Endomysium, Perimysium

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Binding sites for proteins involved in signaling cascades. Action potential enters muscle and causes calcium release. Rapid and sustained depolarization of the nerve membrane leads to an action potential. Membrane must first reach threshold before action potential can occur. Depolarization is movement from negative positive charges (which genterates electricity) Accumulation or sum of all the charges within the nerve, k is positive, charges of membrane is negative cl is negative, if we sum all those what we get is -70mv resting portential. Depolarization, na rushes in so it"s positive got from -70 to +30mv. Negatives inside the cell positives outside the cell. While the nerve is depolarized, that particular area can"t be repolarized. This prevents the ap from going backwards (one way movement) Due to influx of na from depolarization of channel. Finally we need to get back to k inside na outside (salty banana) we use the sodium potassium pump. Myelinated areas we will see normal ap propagation.

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