Anatomy & Physiology (6th Edition)
6th Edition
ISBN: 9780134156415
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Chapter 9.6, Problem 14CYU
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
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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?
In order to study and understand muscle diseases, one needs to have a good understanding of normal muscle function.
Briefly outline the process of cross-bridge cycling in muscle contraction.
Be sure to highlight the role of Ca2+ and ATP/ADP in the process.
Which of these is the proper sequence of these events of muscle contraction
1) Action potential propagating down into the T-tubule
2) Power stroke
3) Ca+2 is released from the sarcoplasmic reticulum
4) The tropomyosin shifts out of the way thereby exposing the active sites of the actin
Question 7 options:
a)
1 à 3 à 4 à 2
b)
4 à 3 à 2 à 1
c)
1 à 4 à 2 à 3
d)
3 à 1 à 4 à 2
Chapter 9 Solutions
Anatomy & Physiology (6th Edition)
Ch. 9.1 - When describing muscle, what does striated mean?Ch. 9.1 - Prob. 2CYUCh. 9.2 - How does the term epimysium relate to the role and...Ch. 9.3 - Which myofilaments have binding sites for calcium?...Ch. 9.3 - Which region or organelle-cytosol, mitochondrion,...Ch. 9.3 - MAKING CONNECTIONS Consider a phosphorus atom that...Ch. 9.4 - What are the three structural components of a...Ch. 9.4 - What is the final trigger for contraction? What is...Ch. 9.4 - What prevents the filaments from sliding back to...Ch. 9.4 - What would happen if a muscle fiber suddenly ran...
Ch. 9.5 - What is a motor unit?Ch. 9.5 - What is happening in the muscle during the latent...Ch. 9.5 - Prob. 13CYUCh. 9.6 - When Eric returned from jogging, he was breathing...Ch. 9.7 - List two factors that influence contractile force...Ch. 9.7 - Prob. 16CYUCh. 9.8 - How do aerobic and resistance exercise differ in...Ch. 9.9 - Compare the structures of skeletal and smooth...Ch. 9.9 - Calcium is the trigger for contraction of all...Ch. 9.9 - How does the stress-relaxation response suit the...Ch. 9.9 - MAKING CONNECTIONS Intracellular calcium performs...Ch. 9 - The connective tissue covering that encloses the...Ch. 9 - Prob. 2MCCh. 9 - Prob. 3MCCh. 9 - Prob. 4MCCh. 9 - Prob. 5MCCh. 9 - Contraction elicited by a single brief stimulus is...Ch. 9 - A smooth, sustained contraction resulting from...Ch. 9 - Characteristics of isometric contractions include...Ch. 9 - During muscle contraction, ATP is provided by (a)...Ch. 9 - The neurotransmitter released by somatic motor...Ch. 9 - The ions that enter the skeletal muscle cell...Ch. 9 - Myoglobin has a special function in muscle tissue....Ch. 9 - Prob. 13MCCh. 9 - The smooth muscle type found in the walls of...Ch. 9 - Name and describe the four special functional...Ch. 9 - Distinguish between (a) direct and indirect muscle...Ch. 9 - (a) Describe the structure of a sarcomere and...Ch. 9 - What is the importance of acetylcholinesterase in...Ch. 9 - Explain how a slight (but smooth) contraction...Ch. 9 - Explain what is meant by the term...Ch. 9 - Define and draw a motor unit.Ch. 9 - Describe the three distinct types of skeletal...Ch. 9 - True or false: Most muscles contain a predominance...Ch. 9 - Describe some cause(s) of muscle fatigue and...Ch. 9 - Define EPOC.Ch. 9 - Smooth muscle has some unique properties, such as...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...Ch. 9 - Lets continue our tale of Mrs. DeStephanos medical...
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- Most immediate physiological adjustments to exercise occur prior to any change in tissue metabolic demand for oxygen or nutrients. This occurs because exercise increases sympathetic nervous system activity. With your knowledge of exercise and the control of alpha motor neurons by the primary motor cortex of the brain, how does increased exercise influence the sympathetic nervous system?arrow_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_forwardWhich of the following would be recruited in a muscle stimulation when contractile strength increases? A) Many small motor units with the ability to stimulate other motor units B) Motor units with the longest muscle fibers C) Motor units with larger, less excitable neurons D) Large motor units with small, highly excitable endurancearrow_forward
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