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Skeletal muscle fibers can be categorized into two types: slow-twitch (Type I) and fast-twitch (Type II). Type I muscle fibers are more efficient over long periods of time. They are mainly used for postural maintenance (such has holding the head upright), or endurance exercises (like marathon running).
Explanation:
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Answer:D
Explanation:
Signs and symptoms of PCOS include irregular or no periods, heavy menstrual bleeding, lots of hair on the body and face, acne, pelvic pain, difficulty getting pregnant, and skin tone. thicker, darker patches.
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Answer:
They provide minimal friction