Skeletal System Structure and Division — NEET Biology
📚 Practice ConceptSkeletal system consists of a framework of bones and a few cartilages. This system has a significant role in movement shown by the body. Imagine chewing food without jaw bones and walking around without the limb bones. Bone and cartilage are specialised connective tissues. The former has a very hard matrix due to calcium salts in it and the latter has slightly pliable matrix due to chondroitin salts. In human beings, this system is made up of 206 bones and a few cartilages. It is grouped into two principal divisions – the axial and the appendicular skeleton.
Which of the following statements related to the skeletal system and its disorders are NOT correct? S1. The hard matrix of bone is primarily due to calcium salts, while cartilage possesses a slightly pliable matrix containing chondroitin salts. S2. Osteoporosis is an age-related disorder characterized by increased bone mass and decreased chances of fractures. S3. A common cause for osteoporosis, particularly in women, is a decrease in levels of the hormone estrogen. S4. Tetany results from low Ca++ levels in body fluid, leading to rapid muscle spasms and eventually, a compensatory increase in bone formation. S5. Gout is primarily an autoimmune disorder that causes severe inflammation of the joint capsules due to immune system overactivity.
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