. Production of blood cells is NOT a function of the skeletal system. __________ 2. Mitosis resulting in elongation of bone occurs at the articular cartilage. __________ 3. A combination of the hormone, adrenal cortisol, and the bone cell, osteoclast, may result in osteoporosis.
Indicate if the statements are TRUE or FALSE.
__________ 1. Production of blood cells is NOT a function of the skeletal system.
__________ 2. Mitosis resulting in elongation of bone occurs at the articular cartilage.
__________ 3. A combination of the hormone, adrenal cortisol, and the bone cell, osteoclast, may result in osteoporosis.
__________ 4. Hematopoiesis would most likely take place in the hyoid bone.
__________ 5. Remodeling of bone is a function of osteoclasts and osteoblasts.
_________ 6. The addition of bone to its outer surface resulting in growth in diameter is called appositional growth.
_________ 7. Thyroid hormone may produce either osteogenesis or osteolysis.
_________8. Most bones of the body are formed by intramembranous ossification.
_________9. Once an individual reaches skeletal maturity, the bones undergo years of
________ 10. Bone matrix is composed primarily of calcium and magnesium, which may be withdrawn in
small amounts as needed elsewhere in the body.
________ 11. Actin is found only in the striated fibers of cardiac and skeletal muscles.
________ 12. Slow twitch msucle fibers are more resistant to fatigue than other muscle fiber types.
________ 13. A sarcomere is the region of a myofibril that lies between two consecutive Z lines.
________ 14. An action potential in a muscle fiber is initiated by stimulation across the neuromuscular junction.
________ 15. A muscle triad consists of sarcoplasmic reticulum, a T tubule, and a terminal cisternum.
________ 16. Thin myofilaments are primarily composed of myosin proteins.
________ 17. An accumulation of lactic acid is the principal cause of sore muscles
________ 18. Anaerobic respiration is the first choice of the muscle cell for the production of ATP.
________ 19. During rest, excess oxygen molecules in the sarcoplasm are attracted to a large protein molecule called myoglobin.
________ 20. To initiate muscle contraction, calcium ions bind to and change the shape of the troponin protein molecules, which then pull the tropomyosin proteins off the myosin binding sites of the actin helix.
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