Chemical Composition of Bone 7. What is the function of the organic matrix in bone? 8. Name the important organic bone components. 9. Calcium salts form the bulk of the inorganic material in bone. What is the function of the calcium salts? 10. Baking removes from bone. Soaking bone in acid removes
The Correct Answer and Explanation is :
7. Function of the Organic Matrix in Bone
The organic matrix of bone, also known as the osteoid, plays a critical role in providing flexibility and tensile strength to bone. It consists mainly of collagen fibers, which give the bone its ability to resist stretching and bending forces. This matrix also contains glycosaminoglycans, proteoglycans, and glycoproteins, which help maintain the structure and integrity of the bone tissue. The organic matrix is essential for the bone’s resilience, preventing it from becoming brittle and fragile. Without the organic matrix, bones would be overly rigid and prone to breaking under stress.
8. Important Organic Bone Components
The primary organic components of bone are:
- Collagen (Type I): This protein forms a scaffold that provides strength and flexibility.
- Proteoglycans: These are large molecules composed of proteins and sugar chains that help in water retention and provide the bone with shock-absorbing properties.
- Glycoproteins: These proteins play a role in regulating the mineralization process and in the binding of osteoblasts (bone-forming cells) to the bone matrix.
- Osteocalcin: A protein that binds calcium and helps in bone mineralization.
9. Function of Calcium Salts in Bone
Calcium salts, primarily in the form of hydroxyapatite crystals (Ca10(PO4)6(OH)2), make up the bulk of the inorganic material in bone. Their primary function is to provide rigidity and compressive strength to the bone. Calcium salts are tightly bound to the collagen matrix, allowing bones to withstand weight-bearing forces and pressure. This mineralization also plays a key role in bone’s role as a reservoir for calcium, which can be released into the bloodstream when needed for various physiological functions like muscle contraction and blood clotting.
10. Effects of Baking and Soaking Bone in Acid
- Baking bone: Baking removes the organic components of the bone (primarily collagen), leaving behind the inorganic mineral content. This makes the bone brittle and easily breakable.
- Soaking bone in acid: Soaking bone in acid removes the inorganic components, primarily the calcium salts, leaving behind the organic matrix. This results in a bone that is more flexible but lacking in strength.
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Here is an image that illustrates the chemical composition of bone, showing both the organic and inorganic components, as well as the effects of baking and soaking in acid. It highlights the role of collagen fibers, calcium salts, and other key organic components in bone structure. Let me know if you need further details or clarification!
