Rigor mortis

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10.3: Muscle Fiber Contraction and Relaxation - Medicine LibreTexts Muscle Contraction Steps, Rigor Mortis, Basic Anatomy And Physiology, Exercise Physiology, Musculoskeletal System, Medicine Student, Muscular System, Nursing School Notes, Teaching Biology

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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fintan on Instagram: "Meat spasms in freshly butchered beef 🥩. 
This reaction can happen because of several reasons, but typically it’s the nerve endings and muscles using up the last of their energy because they either don’t know what to do or are reacting to the exposure to air. Eventually this action will cause the muscles to lock as the cadaver goes into rigor mortis.

Yummy!" Rigor Mortis, The Nerve, Nerve, Don T Know, Muscles, Meat, Energy, Canning, Instagram

fintan on Instagram: "Meat spasms in freshly butchered beef 🥩. This reaction can happen because of several reasons, but typically it’s the nerve endings and muscles using up the last of their energy because they either don’t know what to do or are reacting to the exposure to air. Eventually this action will cause the muscles to lock as the cadaver goes into rigor mortis. Yummy!"

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