cell that reabsorbs bone material in order to repair cracks and supply calcium to the blood cushions joints where bones articulate with one another cell that synthesizes bone material composed of protein and mineral connect bones to other bones transition zone where muscle and tendon attach to one another point of attachment between muscle and chitinous exoskeleton connect skeletal muscles to bones

Muscles , joints, lever, plane and connective tissues that involved in lift a heavy box from floor to chest

Which of these does NOT apply to smooth muscle cells?     actin and myosin filaments are arranged in sacromeres     calcium is required for contraction to occur     during contraction myosin proteins attach to and pull on actin     cells can divide to replace neighboring cells that are injured or destroyed

Can you match the sacromere anatomy with the proper answer from the list below the table graph? Sarcomere Anatomy Description/Reaction Thin Filaments ? Thick Filaments  ? A Band  ? I Band ? M Line ? H Zone ? Z Disc ? A) G-Actin, F-Actin, Troponin, Tropomyosin B) Myosin C) Bisected by the M Line, this area shows only the thick filaments without any thin filamentous overlap D) The point of origin for myosin filaments found in the center of the sarcomere E) An area in the center of the sarcomere marked by the entire length of the thick filaments F) A space between sarcomeres with the z-disc in the center; this region shows Actin's anchorage points and extension without myosin overlap G) Anchoring point for the thin filaments

See attachment

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Which best describes the composition of compact bone?   A 2 percent living cells; 66 percent calcium phosphate; 32 percent protein   B 2 percent protein; 98 percent calcium carbonate   C 1 percent living cells; 49 percent vitamin D; 50 percent calcium carbonate   D 2/3 calcium carbonate; 1/3 calcium phosphate