An age-related skeletal disease that is characterized by loss of bone mineral density and increased bone fragility is
neoplasms.
Paget's disease.
osteoporosis.
osteomalacia.
The Correct Answer is C
A. neoplasms: This refers to tumors or new, abnormal growths of tissue, which can be cancerous or benign.
B. Paget's disease: This involves irregular bone remodeling leading to enlarged and deformed bones, but it is not defined primarily by a simple loss of density.
C. osteoporosis: This is the classic age-related condition where bone resorption exceeds bone formation, leading to porous, brittle bones.
D. osteomalacia: This is a softening of the bones, typically due to a vitamin D deficiency, often called "rickets" in children.
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Related Questions
Correct Answer is {"dropdown-group-1":"D"}
Explanation
A. Spectrin: This is a cytoskeletal protein that gives red blood cells their flexibility.
B. Erythropoietin: This is a hormone produced by the kidneys that stimulates the production of red blood cells.
C. Serum: Serum is the liquid portion of blood that remains after a clot has formed; it does not prevent clotting.
D. Heparin: Heparin is a natural anticoagulant produced by basophils and mast cells that inhibits the action of thrombin to prevent intravascular clotting.
Correct Answer is B
Explanation
A. Movement: This is a primary function; skeletal muscles move the skeleton, and smooth muscles move substances through organs.
B. Protection: While muscles provide some padding, protection is considered a primary function of the skeletal system (rib cage, skull) and integumentary system (skin).
C. Heat production: Muscles produce a significant amount of heat as a byproduct of contraction (thermogenesis), which is vital for maintaining body temperature.
D. Posture: Skeletal muscles maintain partial contraction (tonus) to keep the body upright and stable.
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