Which of the following is a disease of the musculoskeletal system?

Osteoporosis is a disease that specifically affects the musculoskeletal system, primarily characterized by weakened bones that are more susceptible to fractures. It occurs when the creation of new bone doesn't keep up with the removal of old bone, leading to a decrease in bone density and overall strength. This condition commonly results in increased fragility, which can significantly impact mobility and quality of life.

The other options relate to different body systems; for instance, asthma is a respiratory condition, diabetes is an endocrine disorder related to insulin and blood sugar regulation, and hypertension pertains to the cardiovascular system, involving elevated blood pressure. Understanding the specific functions and diseases associated with the different bodily systems is crucial for recognizing the signs and symptoms that certified nursing assistants (CNAs) may encounter in their practice.