1.3 Excitation-contraction coupling
Cards (20)
- What does the term "excitation-contraction coupling" refer to?
- How does excitation-contraction coupling differ in cardiac muscle compared to skeletal muscle?
- What spreads the action potential in cardiac muscle fibers?
- What triggers the release of calcium ions into the muscle sarcoplasm?
- What role do calcium ions play in muscle contraction?
- What are ryanodine receptor channels responsible for?
- Why is calcium from T tubules important for cardiac muscle contraction?
- How much larger are the T tubules in cardiac muscle compared to skeletal muscle?
- What is the effect of extracellular calcium concentration on cardiac muscle contraction?
- What happens to a heart placed in a calcium-free solution?
- How does the T tubule system relate to extracellular fluid in cardiac muscle?
- How does skeletal muscle contraction differ in response to extracellular calcium concentration changes?
- What happens to calcium ions at the end of the cardiac action potential?
- What pump helps transport calcium back into the sarcoplasmic reticulum?
- What is the role of the sodium-calcium exchanger in cardiac muscle?
- What happens to contraction after calcium is removed from cardiac muscle fibers?
- How long does cardiac muscle contraction last after the action potential begins?
- What primarily determines the duration of cardiac muscle contraction?
- How long is the duration of contraction in atrial muscle?
- How long is the duration of contraction in ventricular muscle?