Gen Combo Ll Basic Biomechanics; Connect Ac; Maxtraq Software Ac
8th Edition
ISBN: 9781264013876
Author: Hall
Publisher: McGraw-Hill Education
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Chapter 12, Problem 4AP
Explain the interrelationships among
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Isometric exercise is best described as
applying a force
O a) with movement through a full and
complete range of motion
O b) while a muscle is lengthening and
returning to a resting position
c) without any change in length of
the muscle
O d) at a constant speed
demonstrate an understanding of and assess factors that affect performance during human movement.
True/false
Large motor unit is involved with fine-motor movement (precision)
Chapter 12 Solutions
Gen Combo Ll Basic Biomechanics; Connect Ac; Maxtraq Software Ac
Ch. 12 - How much force must be applied by a kicker to give...Ch. 12 - A high jumper with a body weight of 712 N exerts a...Ch. 12 - What factors affect the magnitude of friction?Ch. 12 - If s between a basketball shoe and a court is...Ch. 12 - A football player pushes a 670-N blocking sled....Ch. 12 - Lineman A has a mass of 100 kg and is traveling...Ch. 12 - Prob. 7IPCh. 12 - A ball dropped on a surface from a 2-m height...Ch. 12 - A set of 20 stairs, each of 20-cm height, is...Ch. 12 - A pitched ball with a mass of 1 kg reaches a...
Ch. 12 - Identify three practical examples of each of...Ch. 12 - Prob. 2APCh. 12 - A 2-kg block sitting on a horizontal surface is...Ch. 12 - Explain the interrelationships among mechanical...Ch. 12 - Prob. 5APCh. 12 - A 108 cm, 0.73-kg golf club is swung for 0.5 s...Ch. 12 - A 6.5-N ball is thrown with an initial velocity of...Ch. 12 - Prob. 8APCh. 12 - Using the principle of conservation of mechanical...Ch. 12 - Prob. 10AP
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- Define and draw a motor unit.arrow_forward2. We discussed how muscle spindles allow for precision of movement as a muscle lengthens, and particular muscles which require more precise movements will contain more spindles. In addition to this precision control over muscle length, there are other differences between muscles which enable more precision in how much force is generated. Consider the two graphs below which depict force generated by two different muscles as additional motor units are recruited. Force Muscle A Load Force Muscle B Load a) Describe why the first steps for a low force contraction in both muscles are smaller than the later ones in the context of motor units and force production.arrow_forwardDescribe how each of the following factors influences motor unit recruitment: a) Increasing contraction speed b) Increasing force output c) Increasing fatiguearrow_forward
- Define the following parameters that can be assessed via isokinetic dynamometry (attempt to use your own words after reviewing data sheet): Peak Torque Time to peak torque Angle of peak torque Torque at 0.2 seconds Peak torque/body weight Total work Work fatigue (Fatigue Index) Average powerarrow_forwardMotor control can be defined as the acquisition of relatively permanent movement skills resulting from practice and repeated experience. True Falsearrow_forwardExplain in short term asaparrow_forward
- demonstrate an understanding of human growth and motor development and apply it to the design of age-appropriate movement activities and to the enhancement of movement skills.arrow_forwardHow can interval training be used to improve both aerobic and anaerobic power?arrow_forwardDefine motor unit and describe its structure?arrow_forward
- Distinguish between concentric, isometric and eccentric contractions, the physiology of the contraction, and what function it serves. Give examples of tasks that involve each type.arrow_forwardDescribe the overall pathway from the decision to move to the execution and monitoring of a motor program?arrow_forwardDefine working distancearrow_forward
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