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Questions and Answers
What does the irritability of the motor unit determine?
What does the irritability of the motor unit determine?
- The duration of discharge of impulses along one motor unit
- The ability of muscle to contract
- The amount of muscle fiber required to initiate a response
- The amount of stimulation required to initiate the response of a muscle fiber (correct)
What is necessary to cause a response in muscle fiber?
What is necessary to cause a response in muscle fiber?
- Threshold stimulation (correct)
- Contractility
- Irritability of the motor unit
- Sub-threshold stimulation
What happens if the stimulus is above the threshold level?
What happens if the stimulus is above the threshold level?
- No muscle activity occurs
- The muscle contracts involuntarily
- Muscle relaxation occurs
- More motor units respond (correct)
What is the mechanical response after depolarization?
What is the mechanical response after depolarization?
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What is simply the ability to contract?
What is simply the ability to contract?
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What is the general rule of viscosity as applied to muscle activity?
What is the general rule of viscosity as applied to muscle activity?
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According to Hooke's law, what happens when a stress is applied to stretch a muscle fiber?
According to Hooke's law, what happens when a stress is applied to stretch a muscle fiber?
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What is stiffness in relation to tissues and structures?
What is stiffness in relation to tissues and structures?
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What can result in fatigue according to the text?
What can result in fatigue according to the text?
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What is contracture in relation to muscle physiology?
What is contracture in relation to muscle physiology?
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