Exercise Physiology: Theory and Application to Fitness and Performance
9th Edition
ISBN: 9780073523538
Author: Scott K Powers, Edward T Howley
Publisher: McGraw-Hill Education
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Chapter 8, Problem 6O
Summary Introduction
To compare: The major biochemical and mechanical properties of the three primary types of muscle fibers found in the human skeletal muscle.
Introduction: A skeletal muscle fiber is a thin, elongated cylinder and is surrounded by a cell membrane called as sarcolemma. The satellite cells are the muscle precursor cells located above the sarcolemma and below the basal lamina. The myofibrils are the thread-like strands within the muscle fibers. Actin is a thin filament and myosin is the thick filament of myofibrils.
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Respond to the following in a minimum of 175 words:
How might CRISPR-Cas 9 be used in research or, eventually, therapeutically in patients?
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Do the advantages of using this technology outweigh the disadvantages (or vice versa)? Explain your position.
You are studying the effect of directional selection on body height in three
populations (graphs a, b, and c below).
(a) What is the selection differential? Show your calculation. (2 pts)
(b) Which population has the highest narrow sense heritability for height?
Explain your answer. (2 pts)
(c) If you examined the offspring in the next generation in each population,
which population would have the highest mean height? Why? (2 pts)
(a)
Midoffspring height (average height of offspring)
Short
Short
Short
Short
(c)
Short
(b)
Short
Tall
Short
Tall
Short
Short
Tall
Midparent height
(average height of
Mean of population = 65 inches
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Mean of population = 65 inches
Mean of breading parents = 70 inches
Mean of population = 65 inches
Mean of breading parents = 70 inches
Chapter 8 Solutions
Exercise Physiology: Theory and Application to Fitness and Performance
Ch. 8 - Prob. 1OCh. 8 - Define satellite cells. What role do satellite...Ch. 8 - List the chain of events that occur during...Ch. 8 - Define both dynamic and static exercise. What...Ch. 8 - Describe the three factors that determine the...Ch. 8 - Compare and contrast the major biochemical and...Ch. 8 - Prob. 7OCh. 8 - Graph and describe the relationship between...Ch. 8 - Prob. 1SACh. 8 - Prob. 2SA
Ch. 8 - Outline the contractile process. Use a...Ch. 8 - Describe the mechanical and biochemical properties...Ch. 8 - Discuss those factors thought to be responsible...Ch. 8 - Define the term summation.
Ch. 8 - Graph a simple muscle twitch and a contraction...Ch. 8 - Discuss the relationship between force and speed...
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