Test Bank for Vanders Human Physiology 15th Edition Eric Widmaier Hershel Raff Kevin Strang

Test Bank for Vanders Human Physiology 15th Edition Eric Widmaier Hershel Raff Kevin Strang.

Chapter 09 Muscle Multiple Choice Questions 1. A myofibril is A. A skeletal-muscle cell B. Composed of filaments C. Composed of proteins D. Both a skeletal-muscle cell and composed of filaments E. Both composed of filaments and composed of proteins Bloom's Level: 1. Remember Section 9A.01 Topic: Muscular System 2. Thick filaments in skeletal muscle are composed of A. Actin B. Myosin C. Troponin D. Calmodulin E. Tropomyosin Bloom's Level: 1. Remember Section 9A.01 Topic: Muscular System 3. During isotonic contraction of a skeletal-muscle fiber the A. Sarcomeres shorten B. A bands shorten C. I bands shorten D. Both sarcomeres shorten and I bands shorten are correct E. Both A bands shorten and I bands shorten are correct Bloom's Level: 1. Remember Section 9A.03 Topic: Muscular System Chapter 09 - Muscle 9-2 4. Which of the following statements regarding the shortening of a skeletal-muscle fiber is not true? When a skeletal-muscle fiber shortens, the A. Sarcomeres shorten B. Distance between Z lines decreases C. Myofilaments shorten D. Myofilaments slide past each other E. Length of the A bands remains the same Bloom's Level: 1. Remember Section 9A.02 Topic: Muscular System 5. In skeletal muscle, calcium facilitates contraction by binding to A. Tropomyosin B. Actin C. Troponin D. Myosin E. The thick filament Bloom's Level: 1. Remember Section 9A.02 Topic: Muscular System 6. Binding of ________ to myosin permits cross-bridge _____________ between actin and myosin. A. ATP; attachment B. ATP; detachment C. Calcium; attachment D. Calcium; detachment E. Actin; detachment Bloom's Level: 1. Remember Section 9A.02 Topic: Muscular System Chapter 09 - Muscle 9-3 7. ATP is necessary for each of the following mechanisms or functions in skeletal muscle except A. Sequestration of Ca2+ into the sarcoplasmic reticulum B. Dissociation of actin from myosin C. Release of Ca2+ from the sarcoplasmic reticulum D. Movement of myosin cross bridges E. Maintenance of the polarized state of the skeletal-muscle membrane Bloom's Level: 1. Remember Section 9A.02 Topic: Muscular System 8. Rigor mortis occurs in a dead person because A. ATP, which is necessary for the detachment of cross bridges, is not being formed B. ATP, which is necessary for the formation of cross bridges, is not being formed C. ATP, which is necessary for the formation of cross bridges, continues to be formed for several hours after death D. Deterioration of muscle proteins prevents detachment of cross bridges E. None of the choices are correct Bloom's Level: 2. Understand Section 9A.02 Topic: Muscular System 9. Rigor mortis is caused by A. Buildup of lactic acid B. Lack of Ca2+ C. Depletion of glycogen D. Lack of ATP E. Deficient acetylcholine receptors Bloom's Level: 1. Remember Section 9A.02 Topic: Muscular System