Which of the following is NOT an indication of aging in the skeletal system?

The answer indicating that an increase in bone density is NOT an indication of aging in the skeletal system is accurate. As individuals grow older, several changes typically occur in the skeletal system, including the loss of bone density. Factors such as hormonal changes, nutritional deficiencies, and decreased physical activity contribute to the thinning of bones, leading to conditions like osteoporosis.

In contrast, joint stiffness, height loss, and increased susceptibility to fractures are standard indicators of aging. Joint stiffness arises due to degenerative changes in cartilage and increased wear and tear on the joints. Height loss occurs as intervertebral discs degenerate and spinal curvature changes with age, often due to compression fractures. Additionally, as bone density decreases with age, the risk of fractures escalates, making individuals more susceptible to injuries even with minor falls or accidents.

Thus, recognizing that aging commonly leads to a decrease in bone density rather than an increase is crucial in understanding the effects of aging on the skeletal system.