BIOS 1700 Lecture Notes - Lecture 23: Basal Lamina, Laminin, Elastin
6 Dec 2016
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Document Summary
Ecm in plants: ecm is the cell wall. Cell wall has three layers: middle lamella. Composed of carbohydrates: primary cell wall. Composed of cellulose bers: secondary cell wall. Ecm in animals: rich in connective tissue. Made of proteins, polysaccharides, and proteins with polysaccharides: proteins include: collagen, elastin, laminin and more. Collagen elastin, laminin and more make a jell-o like substance: fibroblasts produce the. Collagen and elastin are important: found in skin, type 1 collagen fiber. Also makes ligaments and tendons: vitamin c stimulates the polymerization of collagen. Collagen comes out of cells as monomers and then assembles as a ber: cells in the connective tissues of animals reside in a complex mesh-work of extracellular matrix ber, basal lamina. Gives a rm substrate to all epithelial cells: ping pong balls and tape demonstration. Integrin molecules connect cells to the basal lamina via hemidesmosomes.
