human physiology study questions 18

human physiology study questions 18 - B. Increase the...

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3/5/08 Lecture 18: Muscle II (Ch. 9) Study Questions 1. What best describes the muscle contraction when you have an external load that is equal to your tension development? A. The muscle would shorten, a concentric contraction, and have a fast shortening velocity. B. The muscle would stay the same length, an isometric contraction, and there would be zero contraction velocity. C. The muscle would stay the same length, an isometric contraction, and have a fast contraction velocity. D. The muscle would lengthen, an eccentric contraction, and have a fast lengthening velocity. 2. Which of the following is a correct way to increase the amount of active tension or force that a skeletal muscle can produce? A. Decrease the intracellular concentration of calcium.
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Unformatted text preview: B. Increase the frequency of action potentials. C. Shortening the length of the muscle fibers, in relation to their relaxed length. D. All of the answers are correct. 3. What would the force production and fatigue curve look like for a muscle fiber that tends to have a high contraction velocity and myosin ATP-ase activity but a low myoglobin and mitochondria content? A. It would have a low force output but it would be resistant to fatigue. B. It would have a high force output and be resistant to fatigue. C. It would have a low force output but it would fatigue rather quickly. D. It would have a high force output but it would fatigue rather quickly. Answers: 1)B; 2)B; 3)D...
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This note was uploaded on 07/01/2008 for the course INTEGRATIV 130 taught by Professor Kregel during the Spring '08 term at University of Iowa.

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human physiology study questions 18 - B. Increase the...

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