KIN 205 Lecture Notes - Lecture 2: Conformational Change, Actinin Alpha 2, Desmin

• School: University of Waterloo
• Department: Kinesiology
• Course: KIN 205
• Professor: Marina Mourtzakis

Document Summary

But based on recent evidence, in fact more atp may be needed for ca2+ cycling than for crossbridge cycling. The a band represents the length of the thick filament. Made up of 3 proteins: cytoskeletal proteins. Inhibit or promote between actin and myosin binding so contraction can take place. One z disk to the next is one sarcomere. Under a microscope, thick and thin filaments create a repeating pattern of alternating light and dark bands. Dark is usually thick but can have thin, and light is typically thin. A band is anisotropic since it"s a mix of thin and thick filaments. H zone inside a band that has only thick filaments. M line is to keep the thick filaments in place: dead smack in the middle of the thick filaments. Overall: - the shortening of each sarcomere results in the overall length of muscle shortening. Action: - sliding of thin filaments over the thick.