Why does weight-bearing exercise help prevent osteoporosis?
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Q129: The sliding filament theory states that _
Q130: The sarcoplasmic reticulum
A) stores calcium.
B) sequesters calcium
Q131: The movement of muscle is due to
Q132: Smooth muscle contracts involuntarily, whereas skeletal muscle
Q133: Earthworms have a hydrostatic skeleton. Describe how
Q135: Myofibrils are organized into
A) sarcolemmas.
B) neurilemmas.
C) sarcoplasmic
Q136: Endoskeletons
A) are characteristic of arthropods.
B) are located
Q137: Which of the following statements is false?
A)
Q138: Smooth muscle contracts involuntarily in the digestive
Q139: A soccer player who has suffered a
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