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

10.3: Muscle Fiber Contraction and Relaxation

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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skeletal system - biceps Smooth Muscle Tissue, Cardiac Muscle Cell, Skeleton Muscles, Body Muscle Anatomy, Types Of Muscles, Muscle Structure, Muscle Hypertrophy, Bicep Muscle, Skeletal System
Smooth Muscle Tissue
Cardiac Muscle Cell
Skeleton Muscles
Body Muscle Anatomy
Types Of Muscles
Muscle Structure
Muscle Hypertrophy
Bicep Muscle
Skeletal System

Skeletal System, number of bones in the human body, joints, bone marrow

Skeletal System is the body part that forms the supporting structure of an organism. There are two different skeletal types: the exoskeleton, which is the stable outer shell of an organism, and the endoskeleton, which forms the support structure inside the body

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