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Questions and Answers
What is the primary function of muscle?
What is the primary function of muscle?
- To supply oxygen to the body
- To store energy
- To convert mechanical energy to chemical work
- To convert chemical energy to mechanical work (correct)
How are skeletal muscle fibers bound together?
How are skeletal muscle fibers bound together?
- By nerve impulses
- By lymphatic vessels
- By connective tissue (correct)
- By blood vessels
What carries signals in the form of nerve impulses from the brain or spinal cord to skeletal muscles?
What carries signals in the form of nerve impulses from the brain or spinal cord to skeletal muscles?
- Motor neurons
- Axons (correct)
- Muscle fibers
- Blood vessels
How are somatic motor nerves stimulated to contract skeletal muscles?
How are somatic motor nerves stimulated to contract skeletal muscles?
What is the term used to describe the combination of a single motor neuron and all the muscle fibers it controls?
What is the term used to describe the combination of a single motor neuron and all the muscle fibers it controls?
How do muscle fibers respond when a somatic motor neuron is activated?
How do muscle fibers respond when a somatic motor neuron is activated?
What is the term used to describe the detection, amplification, and recording of changes in skin voltage produced by underlying skeletal muscle contraction?
What is the term used to describe the detection, amplification, and recording of changes in skin voltage produced by underlying skeletal muscle contraction?
What is responsible for inducing voltage differences in the overlying skin when many muscle fibers conducting simultaneously?
What is responsible for inducing voltage differences in the overlying skin when many muscle fibers conducting simultaneously?
Which statement about the magnitudes of action potentials of active motor units is true?
Which statement about the magnitudes of action potentials of active motor units is true?
What is the term used to describe the recorded consequence of propagation of motor nerve impulses at neuromuscular junctions and muscle impulses by sarcolemma?
What is the term used to describe the recorded consequence of propagation of motor nerve impulses at neuromuscular junctions and muscle impulses by sarcolemma?
What are the two principal bioelectric activities that contribute to the complex EMG signal?
What are the two principal bioelectric activities that contribute to the complex EMG signal?
Which term refers to the process of propagation of muscle and nerve impulses that involves both depolarization and repolarization phenomena?
Which term refers to the process of propagation of muscle and nerve impulses that involves both depolarization and repolarization phenomena?
What is the physiological process known as when the brain increases the number of simultaneously active motor units within a muscle to increase its strength of contraction?
What is the physiological process known as when the brain increases the number of simultaneously active motor units within a muscle to increase its strength of contraction?
What is responsible for maintaining skeletal muscles in a constant state of slight tension called tonus?
What is responsible for maintaining skeletal muscles in a constant state of slight tension called tonus?
Which factor contributes to producing smooth controlled movements such as walking, swimming, or jogging?
Which factor contributes to producing smooth controlled movements such as walking, swimming, or jogging?
What does the term 'grading' mean in the context of skeletal muscle contractions?
What does the term 'grading' mean in the context of skeletal muscle contractions?
Which physiological mechanism controls the strength of muscle contraction by adjusting the number of motor units involved?
Which physiological mechanism controls the strength of muscle contraction by adjusting the number of motor units involved?
Why do skeletal muscles exhibit tonus, a constant state of slight tension, even at rest?
Why do skeletal muscles exhibit tonus, a constant state of slight tension, even at rest?
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