Basic Biomechanics
7th Edition
ISBN: 9780073522760
Author: Susan J Hall
Publisher: McGraw-Hill Education
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Chapter 7, Problem 3AP
Summary Introduction
To identify: The sequence of movements that occur at shoulder, elbow, and wrist joints during execution of fore-hand and back hand strokes in a racket sport.
Concept introduction: The musculoskeletal system of the body is composed of skeleton (bones and joint) and the soft tissues (skeletal muscles, ligaments and tendons). The attachment site of two or more bones is known as a joint or an articulation. The function of the joints is to provide stability and mobility to the skeleton. Joint flexibility is the ability to move joints or group of joints in a complete range of motion.
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Basic Biomechanics
Ch. 7 - Construct a chart listing all muscles crossing the...Ch. 7 - Prob. 2IPCh. 7 - Prob. 3IPCh. 7 - INTRODUCTORY PROBLEMS 4. List the muscles that...Ch. 7 - INTRODUCTORY PROBLEMS 5. List the muscles used as...Ch. 7 - INTRODUCTORY PROBLEMS 6. Explain how the use of an...Ch. 7 - INTRODUCTORY PROBLEMS 7. Select a familiar...Ch. 7 - 8. Using the diagram in Sample Problem 7.1 as a...Ch. 7 - 10. Solve Sample Problem 7.2 with the addition of...Ch. 7 - Identify the sequence of movements that occur at...
Ch. 7 - Which muscles are most likely to serve as agonists...Ch. 7 - Prob. 3APCh. 7 - ADDITIONAL PROBLEMS 4. Which muscles are most...Ch. 7 - Prob. 5APCh. 7 - Prob. 6APCh. 7 - 8. How much tension (Fm) must be supplied by the...Ch. 7 - 9. What is the length of the moment arm between...Ch. 7 - Prob. 10AP
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- 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_forwardYou are training athletes for the 100-meter dash. They need muscles specialized for speed and strength, not endurance. What muscle characteristics would your training regimen aim to develop? How would you alter it to train a long-distance swimmer?arrow_forwardWhat is a motor unit? Why does a rapid series of muscle twitches yield a stronger overall contraction than a single twitch?arrow_forward
- Electromyography is a diagnostic test that measures the electrical activity within muscle fibers. _______________ _______________ _______________ _______________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_forwardWhich component is responsible for initially stimulating a muscle contraction? a. proteins b. electrochemical signals c. plasma membranes d. striationsarrow_forward
- Watch this video (http://openstaxcollege.org/l/micromacro) to learn more about macro- and microstructures of skeletal muscles. (a) What are the names of the junction points between sarcomeres? (b) What are the names of the subunits within the myofibrils that run the length of skeletal muscle fibers? (c) What is the “double strand of pearls� described in the video? (d) What gives a skeletal muscle fiber its striated appearance?arrow_forwardWhich arrangement best describes a bipennate muscle? The muscle fibers feed in on an angle to a long tendon from both sides. The muscle fibers feed in on an angle to a long tendon horn all directions. The muscle fibers feed in on an angle to a long tendon horn one side. The muscle fibers on one side of a tendon feed into it at a certain angle and muscle fibers on the other side of the tendon feed into it at the opposite angle.arrow_forwardAfter death, a person no longer makes ATP, so calcium stored in the sarcoplasmic reticulum diffuses down its concentration gradient into the muscle cytoplasm. This result is rigor mortis----an unbreakable state of muscle contraction that stiffens the body for a few days until muscles begin to decay. Explain why this contraction occurs.arrow_forward
- In a rock climber like the man pictured in Figure 14.25, which organs of equilibrium are activated? Figure 14.25 Dangling upside down affects several organs of equilibrium. What are they?arrow_forwardA muscle that has a pattern of fascicles running along the long axis of the muscle has which of the following fascicle arrangements? circular pennate parallel rectusarrow_forwardHow does a muscle fiber incur an oxygen debt?arrow_forward
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