What is the percentage of H₂O in bone cells?
Correct answer: B. 20%
- A. 70%
- B. 20%
- C. 99%
- D. 60%
Explanation
Bone cells are composed of approximately 20% water, which is essential for facilitating cellular functions and maintaining the hydration of the bone matrix. The majority of a bone's composition is mineral-based, primarily calcium phosphate, along with proteins and collagen. Option A (70%) and Option D (60%) are incorrect because they overestimate the water content. Option C (99%) is excessively high as bones are not soft tissues like muscles, which contain more water.
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About Human Skeleton
The human skeleton provides support, protects organs, enables movement with muscles and stores minerals while bone marrow produces blood cells. Questions cover the axial and appendicular skeleton, types of bones and joints, cartilage, ligaments and tendons, and the difference between fixed, slightly movable and freely movable joints.
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