Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Textbook Question
Chapter 12, Problem 37RA
Refer to figure 12.22 to answer the following questions.
Which energy source varies the least during different intensities and durations of exercise? What is the range of its percentage of energy expenditure?
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Which energy source varies the most during different intensities of exercise? What is the range of its percentage of energy expenditure?
Differentiate between anaerobic and aerobic exercise, and explain how energy stores are utilized in each type of exercise.
Describe two types of recommended exercise.
Chapter 12 Solutions
Human Physiology
Ch. 12 - Describe the actions of muscles when they...Ch. 12 - Describe the different levels of muscle structure,...Ch. 12 - Define the terms motor unit and innervation ratio...Ch. 12 - Using the concept of recruitment, explain how...Ch. 12 - With reference to the sliding filament theory,...Ch. 12 - Prob. 3bCPCh. 12 - Describe a cycle of cross-bridge activity during...Ch. 12 - Prob. 4bCPCh. 12 - Use a flowchart to show the sequence of events...Ch. 12 - Prob. 5bCP
Ch. 12 - Explain how graded contractions and smooth,...Ch. 12 - Prob. 6bCPCh. 12 - Prob. 7aCPCh. 12 - Describe the relationship between the resting...Ch. 12 - Prob. 8CPCh. 12 - Prob. 9CPCh. 12 - Explain the different causes of muscle fatigue...Ch. 12 - Prob. 11CPCh. 12 - Prob. 12aCPCh. 12 - Describe all of the events that occur from the...Ch. 12 - Prob. 13CPCh. 12 - Explain the significance of reciprocal innervation...Ch. 12 - Describe the functions of gamma motor neurons and...Ch. 12 - Explain how cardiac muscle differs from skeletal...Ch. 12 - Contrast the structure of a smooth muscle cell...Ch. 12 - Distinguish between single-unit and multiunit...Ch. 12 - Describe the events by which depolarization of a...Ch. 12 - Prob. 1RACh. 12 - Prob. 2RACh. 12 - Prob. 3RACh. 12 - Prob. 4RACh. 12 - Prob. 5RACh. 12 - Prob. 6RACh. 12 - Prob. 7RACh. 12 - Electrical excitation of a muscle fiber most...Ch. 12 - The energy for muscle contraction is most directly...Ch. 12 - Prob. 10RACh. 12 - Prob. 11RACh. 12 - Prob. 12RACh. 12 - Which of these types of muscle cells are not...Ch. 12 - Prob. 14RACh. 12 - In an isotonic muscle contraction,...Ch. 12 - Prob. 16RACh. 12 - Prob. 17RACh. 12 - Prob. 18RACh. 12 - Using the concept of motor units, explain how...Ch. 12 - Prob. 20RACh. 12 - Explain why the myosin heads don't bind to the...Ch. 12 - Using the sliding filament theory of contraction,...Ch. 12 - Prob. 23RACh. 12 - Prob. 24RACh. 12 - Prob. 25RACh. 12 - What changes occur in muscle metabolism as the...Ch. 12 - Prob. 27RACh. 12 - Compare cardiac muscle, single-unit smooth muscle,...Ch. 12 - Your friend eats huge helpings or pasta for two...Ch. 12 - Prob. 30RACh. 12 - Prob. 31RACh. 12 - How is electrical excitation of a skeletal muscle...Ch. 12 - Prob. 33RACh. 12 - Prob. 34RACh. 12 - Prob. 35RACh. 12 - Prob. 36RACh. 12 - Refer to figure 12.22 to answer the following...Ch. 12 - Refer to figure 12.22 to answer the following...Ch. 12 - Prob. 39RACh. 12 - Refer to figure 12.22 to answer the following...
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- Describe the changes that occur in skeletal muscle as a result of endurance training. Include a brief discussion on how endurance training improves acid-base balance during exercise. What physiological benefits may happen for an older adult who begins a progressive resistance-training program?arrow_forwardThe oxygen consumed after strenuous exercise stops is significantly greater than the oxygen deficit and is termed excess postexercise oxygen consumption (EPOC). Why is so much more oxygen required after intense exercise?arrow_forwardExplain the role of the skeletal muscle pump in exercise performance.arrow_forward
- Read over the following article from the New York Times It describes a study in which researchers look at the changes in different types of molecules during exercise. For this question, complete the following: Briefly summarize the article Provide information about the study as to what they were looking at and any results or findings. Discuss your interest in a exercise system or response described in the article and outline how you would find more information on this topic.arrow_forwardDescribe possible mechanisms for why blood pressure may have a greater change during the Valsalva maneuver during an isometric contraction (plank) versus intense aerobic exercise.arrow_forwardThe goal of progressively advancing exercise, starting with slow basic movements and moving toward quick, full speed movements is done during what?arrow_forward
- What are the physiological changes that can occur when an individual adds resistance training to their current aerobic endurance training program? Give as much detail as you can on changes within the neuromuscular system, musculoskeletal system, and cardiorespiratory system.arrow_forwardDifferentiate between anaerobic and aerobic exercise.arrow_forwardDescribe the interrelationships among muscle work, oxygen consumptionand cardiac output.arrow_forward
- Draw a figure of oxygen consumption (L-min-¹) over time from resting to the start of exercise at a constant submaximal intensity. Label your axes, label steady state, and label the period of "oxygen deficit".arrow_forwardWhat is acute response to exercise?arrow_forwardPlease explain in detaikl How much exercise is enough? Discuss the controversy among professional groups in determining recommended exercise.arrow_forward
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