BISC 320 Lecture Notes - Lecture 17: Muscle Spindle, Chemical Synapse, Tetany
9 Oct 2017
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Twitch fiber types: slow-oxidative (type 1, low myosin-atpase activity, myosin-atpase must hydrolyze atp in order for the power stroke to occur. Muscle cells could die through programmed cell death: antipoptotic, anti-inflammatory-prevent cellular damage, has side effects, such as increased aggression and increased cancer risk. Ca release stops once the action potential has passed. Decreased calcium in the cytoplasm will cause the ca bound to troponin to be released and move down its concentration gradient toward the pumps. >600 v: could stun a human and has killed crocodiles, used to stun prey and explore the environment, coiling doubles shock strength, large eels can produce larger shocks, but young eels cannot. Young eels coil up, doubling the shock strength because the head of the eel serves as the positive pole and the tail as the negative end. Bringing the head close to the tail reduces the distance and concentrates the electric field.
