To discuss:
The purpose and process of bone resorption and the identity of the cells and cell secretions that carry it out.
Introduction:
Mineralization is a process (crystallization) that deposit phosphate, calcium, and other ions (from blood plasma) in the tissues of the bone as hydroxyapatite. This process is initiated by the osteoblast by laying collagen fibers on the surface of the osteon. These fibers are coated with minerals that make the matrix hard. Only if the concentration of the products (of above minerals) in the plasma reaches the critical value (solubility product), the hydroxyapatite is formed. Sometimes, calcification is repressed by some inhibitors found in the tissue. This inhibitor is deactivated by osteoblast and it enables the precipitation of the salt in the matrix of the bone. The initially formed crystals perform like a “seed of crystals” which attract more phosphate and calcium from the plasma.
Want to see the full answer?
Check out a sample textbook solutionChapter 7 Solutions
LL INCLUSIVE ACCESS A&P: FORM & FUNCTION
- Briefly explain why each of the following statements is false, or reword it to make it true. 9. Vitamin D promotes bone deposition, not resorption.arrow_forwardDefining characteristics of cartilage as a class; the three types of cartilage andhow they differ in histology, function, and location; the relationship of theperichondrium to cartilage; and where perichondrium is absentarrow_forwardWhat components are necessary for bone regrowtharrow_forward
- Most compact bone is organized in cylindrical units called _____, composed of lamellae encircling a central canal.arrow_forwardfunction of the skeletal systemarrow_forwardBriefly explain why each of the following statements is false, or reword it to make it true. 8. Osteocytes are nourished by blood capillaries in the canaliculi of the osteons.arrow_forward
- Structural characteristics and organ location of: 1. Hyaline Cartilage 2. Elastic Cartilage 3. Fibrocartilagearrow_forwardLateral patellar tilt and subluxation with patellofemoral cartilage degeneration that is worst laterally. There is trochlear dysplasia and borderline tibial lateralization but no other stigmata of instability and no bone bruising that would indicate a recent dislocation.Prominent exostosis off of the posterior aspect of the medial tibial plateau. Marrow appears to be contiguous with the marrow in the proximal tibia which would favor this representing an osteochondroma. This is in contact with both the posterior cruciate ligament and the posterior aspect of the medial femoral condyle. This would certainly be expected to cause impingement in flexion.arrow_forwardStructure of a long bonearrow_forward
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning