Bone Remodeling and Bone Health Quiz

What is the primary function of osteoclasts in the bone remodeling process?

• Resorb bone

• Deposit calcium

• Synthesize collagen

• Form new bone

Which hormone increases bone resorption to release calcium into the bloodstream?

• Testosterone

• Parathyroid Hormone (PTH)

• Estrogen

• Calcitonin

What is the first stage of bone fracture repair?

• Bony callus formation

• Formation of hematoma

• Bone remodeling

• Fibrocartilaginous callus formation

According to Wolff's Law, what happens to bones under increased mechanical stress?

• Bone formation decreases

• Bone resorption decreases

• Bone formation increases

• Bone density decreases

Which cells are responsible for forming new bone?

• Chondrocytes

• Fibroblasts

• Osteoblasts

• Osteoclasts

What is a significant risk factor for osteoporosis in postmenopausal women?

• Increased testosterone levels

• High calcium intake

• Decreased estrogen levels

• Increased physical activity

What is the role of calcitonin in bone remodeling?

• Increases bone resorption

• Decreases bone resorption

• Increases osteoblast activity

• Decreases osteoblast activity

During which stage of bone fracture repair do osteoblasts replace the fibrocartilaginous callus with a bony callus?

• Bone remodeling

• Formation of hematoma

• Fibrocartilaginous callus formation

• Bony callus formation

What happens to bone density as individuals age?

• Bone density increases

• Bone density remains the same

• Bone density decreases

• Bone density fluctuates

Which of the following is NOT a factor contributing to osteoporosis?

• Hormonal changes

• Physical inactivity

• Increased mechanical stress

• Nutritional deficiencies