Isometric and Isotonic muscle contractions

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The crossbridge cycle describes the calcium-dependent interaction of actin and myosin during muscle contraction. Intracellular calcium binds troponin and causes a conformational change, leading to the movement of tropomyosin out of the myosin-binding site on actin. The myosin head binds actin at a 90° angle, forming a crossbridge. • Further information can be found in the following AMBOSS article: https://www.amboss.com/us/library#xid... • Subscribe to AMBOSS YouTube for the latest clinical examination videos, medical student interviews, study tips and tricks, and live webinars! • Free 5-Day Trial: https://go.amboss.com/04g • Instagram:   / amboss_med   • Facebook:   / amboss.med   • Twitter:   / ambossmed   • #AMBOSSMed

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