BIOL 2410 Lecture Notes - Lecture 3: Sliding Filament Theory, Andrew Huxley, Neuromuscular Junction
9 Mar 2018
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Document Summary
Muscle contraction creates a force that allows us to move or resist a load. Muscle tension: the force created by contracting muscle. Load: a weight or force that opposes contraction of a muscle. Contraction: creation of tension in a muscle: an active process that requires energy from atp. Relaxation: the release of tension created by a contraction. Actin and myosin slide past each other during contraction. When muscles move a load they shorten. Theory #2: sliding filament theory of contraction by andrew huxley and rolf. In each sarcomere: the ends of the thick and thin filaments overlap, has a large i band only thin filaments, has an a band the length of the thick filament. Thick and thin filaments slide past each other. Z disks move closer together as the sarcomere shortens. I band and h zone almost disappear: the regions without thick and thin filament overlap.
