KINE1208 Chapter 6

According to Wolff's Law, what happens when bones experience stress from physical activity?

• They become weaker

• They change their internal structure to resist forces

• They shrink in size

• They lose density

What happens to bones in a zero-gravity environment, such as space?

• They become denser

• They quickly gain strength

• They lose mass

• They remain unchanged

What did the University of Queensland study on rats conclude about intense exercise?

• It increased bone strength significantly

• It had no effect on bone composition

• It caused stress fractures and maladaptation

• It made bones longer and denser

What type of exercise is most effective at increasing bone density?

• Swimming

• Cycling

• Weightlifting

• Yoga

What occurs when a limb is immobilized in a cast for an extended period?

• Increased bone density

• Loss of bone mass (osteopenia)

• Increased muscle strength

• Bone grows thicker

Which professional athletes are often used as an example of bone adaptation?

• Swimmers

• Tennis players

• Soccer players

• Marathon runners

What happens to articular cartilage during cyclical exercise like jogging?

• It thickens and improves force absorption

• It becomes brittle

• It dissolves into synovial fluid

• It turns into bone tissue

What role does synovial fluid play in joint function?

• Provides cushioning and lubrication

• Weakens the joint over time

• Thickens bone tissue

• Decreases mobility

What condition is associated with the breakdown of cartilage and joint stiffness?

• Osteoporosis

• Osteoarthritis

• Scoliosis

• Hypertension

True or False: The biggest contribution of exercise in older adults is reducing the bone loss that occurs with aging.

• True

• False