Essentials of Human Anatomy and Physiology (Custom)
15th Edition
ISBN: 9781269752862
Author: Marieb
Publisher: PEARSON
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Chapter 6, Problem 34CAQ
Summary Introduction
Case summary:
Shabana decides to take the staircase. After two flights she felts slightly breathless and after four she was experiencing discomfort in her leg muscles.
Characters in the case:
Shabana, who is climbing the stairs.
Adequate information:
At first Shabana experiences discomfort after climbing the fourth floor she gets breathless.
To determine:
The pathway which has been used to produce energy as Shabana was climbing stairs also, the reason of Shabana’s discomfort and fatigue.
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Students have asked these similar questions
If we need ATP for both contraction and relaxation, how would you explain why rigor mortis appears in a dead person, but then goes away?
The filaments of skeletal muscle are moved by free energy derived from the hydrolysis of ATP. During sustained muscle contraction ATP levels remain fairly constant, while levels of creatine phosphate fall. Explain why this is so. Under what circumstances is an oxygen debt incurred during muscle contraction?
When an animal dies, its limbs and body become stiff because its muscles go into rigor mortis (literally, rigor mortis means “stiffness of death”). Why would the loss of ATP following death cause this to happen?
Chapter 6 Solutions
Essentials of Human Anatomy and Physiology (Custom)
Ch. 6 - More than one choice may apply. Identify the...Ch. 6 - Prob. 2MCCh. 6 - More than one choice may apply. Which of the...Ch. 6 - Prob. 4MCCh. 6 - Prob. 5MCCh. 6 - 6. Which of the following muscles attach to the...Ch. 6 - Which of these thigh muscles causes movement at...Ch. 6 - 8. Which of the following insert on the...Ch. 6 - What is major function of muscle?Ch. 6 - Compare skeletal, smooth, and cardiac muscles in...
Ch. 6 - Prob. 11SAECh. 6 - Prob. 12SAECh. 6 - Prob. 13SAECh. 6 - Describe how a neurotransmitter is released into...Ch. 6 - Prob. 15SAECh. 6 - Prob. 16SAECh. 6 - Prob. 17SAECh. 6 - Prob. 18SAECh. 6 - Prob. 19SAECh. 6 - Prob. 20SAECh. 6 - If you were alternately contracting and relaxing...Ch. 6 - The sternocleidomastoid muscles help to flex the...Ch. 6 - Prob. 23SAECh. 6 - Name the prime mover of elbow flexion. Name its...Ch. 6 - Prob. 25SAECh. 6 - The hamstring and quadriceps muscle groups are...Ch. 6 - 27. What two-bellied muscle makes up the calf...Ch. 6 - 28. What happens to muscles when they are...Ch. 6 - Prob. 29SAECh. 6 - 30. Should a triathlete engage in aerobic or...Ch. 6 - Prob. 31CAQCh. 6 - Phil loved to play squash. During a particularly...Ch. 6 - While painting her house, Susan fell off the...Ch. 6 - Prob. 34CAQCh. 6 - 37. Chemical A binds and blocks acetylcholine...
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- When Eric returned from jogging, he was breathing heavily, sweating profusely, and complained that his legs ached and felt weak. His wife poured him a sports drink and urged him to take it easy until he could “catch his breath.” On the basis of what you have learned about muscle energy metabolism, respond to the following questions: Why is Eric breathing heavily? Which ATP-generating pathway have his working muscles been using that makes him breathless? What metabolic products might account for his sore muscles and muscle weakness?arrow_forwardThe 100 meter dash is a quick and short run requiring explosive speed. On completion of the dash the runners will continue to breathe hard for several seconds to minutes even though they are no longer running. Which of the following is the best explanation for why this is so? a.Slow oxidative fibers are recruited last and have only started to work at completion of the run. b.The runners' fast oxidative muscles are so slow to utilize oxygen it only begins aerobic respiration by the time the run has finished. c.The runners' use of stored oxygen, glucose and creatine phosphate is being replenished and this requires a prolonged increase of oxygen intake. d. Since the exercise was mostly aerobic exercise, the runners' bodies have not yet realizedarrow_forwardFor a skeletal muscle to remain rigidly contracted, it needs a continual supply of ATP. Yet, when a skeletal muscle runs out of ATP (in a corpse), it becomes rigid. How can you explain this seeming paradox? Explain how skeletal muscle may remain relaxed even if ATP levels are high.arrow_forward
- After finishing a grueling marathon, a runner exclaims, “Whew, I think I’ve used up all my ATP!” Could this be possible?arrow_forwardAfter strenuous exercise, you may notice that your muscles burn and feel sore the next day. Which statement best explains this phenomenon? (a) Proteins in muscle cells are being digested to provide energy. (b) Carbon dioxide is building up in muscle cells and changing their pH. (c) Spontaneous combustion occurs during strenuous exercise, so avoid it at all costs! (d) ATP is accumulating in muscle cells, causing a burning sensation. (e) Without adequate oxygen, muscle cells are fermenting pyruvate into lactic acid.arrow_forwardShortly after a person dies, Ca2+diffuses out of the saroplasmic reticulum and the body becomes very still and rigid, a phenomenoncalled rigor mortis (rig′er mōr′tis). Given ATP’s role in myosin head movement, propose an explanation for rigor mortis.arrow_forward
- Why 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_forwardExplain in detail why fast-twitch fibers will use anaerobic respiration rather than aerobic respiration even though aerobic respiration is about 20 times more efficient in terms of ATP produced per each glucose molecule?arrow_forwardWhat properties of fast glycolytic and slow oxidative fibersadapt them for different physiological purposes?arrow_forward
- Match types of fibers with their description. These fibers possess large number of mitochondria and are capable of contracting for longer period. ... . Primarily use aerobic respiration but may switch to anaerobic Use anaerobic glycolysis as their ATP source. Use aerobic respiration as their ATP source These fibers are primarily used for movements such as walking. Fatigue quickly 1. Fast Glycolytic (FG) 2. Slow Oxidative (SO) 3. Fast Oxidative (FO)arrow_forward2 a) What does calcium do in a skeletal muscle cell and where in the cell does it come from? b) John’s Stetson (his hat) blew off his head in a strong wind and he sprinted down the hill to retrieve it. Where did his ATP come from in the first 6 seconds and the next 8 seconds of his run?arrow_forwardAt what points in the entire process of aerobic respiration is ATP generated?arrow_forward
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