Bone Density: A Grade 12 Science Worksheet
Explore the biological and physiological aspects of bone density, including factors influencing it, measurement techniques, and related health conditions, suitable for Grade 12 science students.
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Bone Density: A Grade 12 Science Worksheet
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Read each question carefully and provide concise answers. Use your knowledge of biology and human physiology to respond comprehensively.
1. Briefly describe the two main types of bone tissue and their primary functions. How do their structural differences contribute to their respective roles in maintaining bone density and strength?
2. Which of the following hormones plays a crucial role in regulating calcium levels in the blood and promoting calcium deposition into bones?
Parathyroid hormone (PTH)
Calcitonin
Insulin
Thyroxine
3. The continuous process of bone breakdown and formation is known as bone . This process involves two main types of cells: responsible for bone resorption, and responsible for bone formation.
4. Osteoporosis is a condition characterized by abnormally high bone density, making bones stronger and less prone to fractures.
True
False
5. Explain the principle of Dual-energy X-ray Absorptiometry (DXA) in measuring bone mineral density. What are the advantages of using DXA compared to other methods?
Match each term on the left with its correct description on the right.
1. Osteoblast
a. Bone-resorbing cell
2. Osteoclast
b. Bone-forming cell
3. Remodeling
c. Process of bone breakdown and formation