True or False: Aging leads to joint stiffness and a decrease in bone density, often resulting in loss of height.

The statement is true because aging is associated with several physiological changes that affect the body's musculoskeletal system. As people age, the cartilage that cushions the joints begins to wear down, leading to joint stiffness and reduced flexibility. This stiffness can be caused by a combination of factors, including decreased synovial fluid production, changes in the connective tissues, and an increase in inflammation.

Additionally, aging is linked with a decline in bone density, known as osteoporosis, which occurs due to a decrease in the production of bone-forming cells and an imbalance between bone formation and bone resorption. As bone density decreases, the structural integrity of the bones is compromised, which can lead to an increased risk of fractures. Moreover, loss of bone density and the resulting changes in the spine, particularly in the vertebrae, can lead to a reduction in overall height over time. Therefore, the connection between aging, joint stiffness, decrease in bone density, and loss of height is well established, making the statement accurate.