What is osteoporosis characterized by?

• A. An increase in muscle mass
• B. A loss of calcium resulting in brittle bones
• C. An increase in bone density
• D. Development of stronger bones

Answer: (B)

Osteoporosis is characterized by a loss of calcium in the bones, which leads to increased fragility and a higher risk of fractures. As the bone density decreases, the structural integrity of the bones weakens, making them more susceptible to breaking easily from falls or even minor stress. This condition is particularly common among older adults, especially postmenopausal women, due to hormonal changes that affect calcium retention and bone health. The emphasis on calcium loss is crucial because it directly links the weakening of bones to the disease, distinguishing it from conditions or states that involve increases in muscle mass or bone density, which are not associated with osteoporosis.