PHYSIOLOGY
GENERAL PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Motor neuron
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Motor fiber
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Muscle
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Nerve
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Detailed explanation-1: -All muscle fibers in a motor unit are of the same fiber type. When a motor unit is activated, all of its fibers contract. In vertebrates, the force of a muscle contraction is controlled by the number of activated motor units.
Detailed explanation-2: -A motor unit consists of a neuron plus the muscle fibers it supplies. There are many motor units in a nerve that collectively provide electrical input to a muscle to generate a muscle contraction.
Detailed explanation-3: -: a nerve fiber whose stimulation causes muscular contraction.
Detailed explanation-4: -Within skeletal muscles, there are three muscle fibre types. Type one (I), type two A (IIa) and type two B (IIb). Each fibre type has different qualities in the way they perform and how quickly they fatigue.