HUMAN PHYSIOLOGY
LOCOMOTION AND MOVEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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T
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F
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Either A or B
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None of the above
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Detailed explanation-1: -Isotonic contractions generate force by changing the length of the muscle and can be concentric contractions or eccentric contractions. A concentric contraction causes muscles to shorten, thereby generating force. Eccentric contractions cause muscles to elongate in response to a greater opposing force.
Detailed explanation-2: -Introduction. When a muscle is lengthening while activated (i.e., eccentric muscle action), it produces significantly more force and requires less energy than a muscle contracting isometrically (i.e., constant muscle length) or concentrically (i.e., active shortening).
Detailed explanation-3: -Muscle actions are categorized as concentric, eccentric, or isometric depending on whether the muscle shortens, lengthens, or remains the same.
Detailed explanation-4: -There are three types of muscle contraction: concentric, isometric, and eccentric. Labeling eccentric contraction as “contraction” may be a little misleading, since the length of the sarcomere increases during this type of contraction.