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Chapter Assessment Lesson 5.2
Learning Key Terms and Concepts
A nerve that stimulates skeletal muscle is called a(n) _____.
The functional unit of the neuromuscular system is the _____.
A(n) _____ is an electrical charge that creates tension within a muscle fiber.
_____ twitch muscle fibers contract powerfully but fatigue quickly.
Thinking Critically
Discuss muscle fiber arrangements that contribute to the force a muscle can generate.
How do you think slow-twitch muscle fibers are usually arranged? Give reasons for your answer.
Who generates more power: an olympic weight lifter who must lift 400 pounds from the ground to a position over his head very rapidly, or a power lifter who must squat down and stand up with 800 pounds on his back? Defend your answer.
Discuss how torque is used to measure the strength of a muscle group at a specific joint.
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