BIOD43H3 Lecture Notes - Lecture 2: Chemical Energy, Gravitational Energy, Electric Potential
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E. g. , mouse vs. elephant: does it have same net benefit, because mouse is smaller, muscles produce less force, limbs change less and need less power, costs need to consider, what i(cid:373)pacts a(cid:374)i(cid:373)als" su(cid:396)(cid:448)i(cid:448)al, higher fecundity. Many forms of energy: kinetic energy: energy of motion, potential energy is important, gravitational potential energy: related to center of mass. Origins of chemical energy: ultimately, chemical energy is coming from further down the food chain from light, heat or inorganic molecules, deep sea planktons that harvest energy. Neuromuscular junction receives ap, causing excitatory post-synaptic ap (23:55: skeletal muscle cell fires ap, excitable, propagates across ap, depolarization causes dihyd(cid:396)opy(cid:396)idi(cid:374)e (cid:396)ya(cid:374)odi(cid:374)e receptor to undergo conformational change, releasing. Ca2+ (which is stored at high concentration: 2. Ca2+ bound up with troponin complex, undergoes conformational change: tropomyosin in resting state is normally blocking access to myosin-binding site, is yanked away due to interaction with troponin, 3. We see cross-bridge cycle start so that myosin can now bond: 4.
