Anatomy and Cell Biology 3309 Lecture 2: Lab Notes - Quiz 2
26 Nov 2016
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Proteoglycan: core protein contains chains of sulfated gags, sulfated component: provides a highly negative charge, water is attracted to it, hematoxylin has high affinity, so very basophilic (hematoxylin overpowers eosin even with collagen) Hyaluronan (hyaluronic acid): non-sulfated gag, long unbranched chains of sugars made of repeating disaccharide units. Lacunae (space that houses chondrocytes) (little bundles of cells) Layer of perichondrium: superficial, outermost layer of cartilage: fibrous: Dict (fibres travelling in different directions: chondrogenic: Appositional growth: chondroblast produces a lot of matrix until they eventually are embedded in the matrix of the cartilage. Matrix directly surrounding isogenous group: inteterritorial: Production of new cartilage within an already existing matrix. Found in attachment bw ribs & sternum, trachea, synovial joints, growth plates. Brand new cartilage (paler staining bc not as many sulfated- Isogenous group (each lacunae show 2 or 4 chondrocytes) Function: provides stiff support, reduces friction in the joints (i. e. lubricates synovial joints)
