NUTRITION
THE HUMAN BODY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Muscle tissue ____ to make parts of your body move.
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expands or lengthens
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contracts or shortens
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lengthens and pushes
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None of the above
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Explanation:
Detailed explanation-1: -Muscle tissue is composed of cells that have the special ability to shorten or contract in order to produce movement of the body parts. The tissue is highly cellular and is well supplied with blood vessels.
Detailed explanation-2: -According to the sliding filament theory, a muscle fiber contracts when myosin filaments pull actin filaments closer together and thus shorten sarcomeres within a fiber. When all the sarcomeres in a muscle fiber shorten, the fiber contracts.
Detailed explanation-3: -Skeletal muscle moves bones and other structures. Cardiac muscle contracts the heart to pump blood. The smooth muscle tissue that forms organs like the stomach and bladder changes shape to facilitate bodily functions.
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