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This principle states that muscle fibers either contract or not at all, muscle cells do not partially contract.
smooth muscle
All or Nothing Principle
atrophy
white fiber
hypertrophy
cardiac muscle
sarcomeres
motor neurons
Nerve cells that trigger muscle contractions are called ______.
smooth muscle
All or Nothing Principle
atrophy
white fiber
hypertrophy
cardiac muscle
sarcomeres
motor neurons
Which type of muscle is designed to operate without tiring and is found only in the heart?
smooth muscle
All or Nothing Principle
atrophy
white fiber
hypertrophy
cardiac muscle
sarcomeres
motor neurons
Which type of fiber contains few mitochondria and myoglobin but fatigue easily?
smooth muscle
All or Nothing Principle
atrophy
white fiber
hypertrophy
cardiac muscle
sarcomeres
motor neurons
Repeating protein fibers that make up myofibrils in muscles are called ______.
smooth muscle
All or Nothing Principle
atrophy
white fiber
hypertrophy
cardiac muscle
sarcomeres
motor neurons
Muscle that enlarge undergo ______.
smooth muscle
All or Nothing Principle
atrophy
white fiber
hypertrophy
cardiac muscle
sarcomeres
motor neurons
Which type of muscle consists of short, wide cells and are specialized for slow, prolonged contractions?
smooth muscle
All or Nothing Principle
atrophy
white fiber
hypertrophy
cardiac muscle
sarcomeres
motor neurons
Muscle that break down undergo ______.
smooth muscle
All or Nothing Principle
atrophy
white fiber
hypertrophy
cardiac muscle
sarcomeres
motor neurons
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