Muscle And Smooth Muscle

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Skeletal muscles are muscles that are attached to the skeleton. They are under voluntary control via the somatic nervous system. In skeletal muscles once the action potential travels to the T tubule, it causes Ca2+ channels to open. This triggers the release of Ca2+ from the terminal cisternae of the sarcoplasmic reticulum. Ca2+ then binds to troponin, this causes tropomyosin to move aside exposing the actin binding sites. This allow for myosin and actin to bind. Smooth muscle is found in the walls of blood vessels, airways and the gut. Smooth muscle also does not have striated fibers like cardiac and skeletal muscle. In smooth muscle once there is enough calcium it will bind to a protein called calmodulin and then bind to the myosin light
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