Body Structures & Functions
12th Edition
ISBN: 9781285695495
Author: Scott
Publisher: Cengage
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- Skeletal muscle contraction requires _________. a. calcium ions b. ATP c. arrival of a nerve impulse d. all of the abovearrow_forwardAny abnormal condition of skeletal muscles is known as _______________________.arrow_forwardFigure 38.37 Which of the following statements about muscle contraction is true? The power stroke occurs when ATP is hydrolyzed to ADP and phosphate. The power stroke occurs when ADP and phosphate dissociate from the myosin head. The power stroke occurs when ADP and phosphate dissociate from the actin active site. The power stroke occurs when Ca2+ binds the calcium head.arrow_forward
- Nerve impulses first stimulate a skeletal muscle fiber at _______. a. T tubules b. sarcomeres c. neuromuscular junctions d. actin binding sitesarrow_forwardWhy do you think a person is able to perform anaerobic exercise (such as lifting and holding a heavy weight) only briefly but can sustain aerobic exercise (such as walking or swimming) for long periods? (Hint: Muscles have limited energy stores.)arrow_forward
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