Muscle contraction

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10.3: Muscle Fiber Contraction and Relaxation - Medicine LibreTexts Mechanism Of Muscle Contraction, Muscle Contraction Steps, Muscle Fiber, Smooth Muscle, Rigor Mortis, Basic Anatomy And Physiology, Exercise Physiology, Musculoskeletal System, Muscular System

The sequence of events that result in the contraction of an individual muscle fiber begins with a signal—the neurotransmitter, ACh—from the motor neuron innervating that fiber. The local membrane of the fiber will depolarize as positively charged sodium ions (Na+) enter, triggering an action potential that spreads to the rest of the membrane will depolarize, including the T-tubules.

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Bhagya Laxmi

This infographic describes skeletal muscles, which are structurally different from heart muscle and the smooth muscle that controls digestion. Unlike heart and smooth msucle, skeletal muscle can be voluntarily controlled. Skeletal muscle is also called striated muscle because of its striped appearance.

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Gabe Pérez

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