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Which of the following hormones can play a significant role in osteoporosis?
(a)Estrogen and parathyroid hormone
(b)Progesterone and aldosterone
(c)Aldosterone and prolactin
(d)Parathyroid hormone and prolactin

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Important Questions on Locomotion and Movement
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Calcium important in skeletal muscle contraction because

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The pivot joint between atlas and axis is a type of

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Out of 'X' pairs of ribs in humans, only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation:

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Name the ion responsible for the unmasking of active sites for myosin for cross-bridge activity during muscle contraction.

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Osteoporosis, an age-related disease of the skeletal system, may occur due to

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Sliding filament theory can be best explained as:

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Glenoid cavity helps in articulation of:

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Which of the following joints would allow no movement?
