BI110 Chapter Notes - Chapter 16: Endoplasmic Reticulum, Cell Plate, Hemicellulose
Document Summary
Forms fibres that intergrade into network of proteoglycans: core is polysaccharide, proteins and smaller carbohydrates branch. Fibronectins: help cells attach and move through ecm. Integrin"s interact with cytoskeleton: transmit messages between microfilaments and ecm. Specialized ecm: basal lamina, muscle tissue--> surrounds muscle fibers giving them strength, skin tissue--> separates the skin from underlying tissues, kidney--> filter, allows substances to pass while retaining others. Changes in ecm: may occur in cancer cells, alter the shape and impair normal function, cause abnormal cell division, responsible for metastasis, spread of cancer from one tissue to another, alter tissue anchoring. Facilitate healing an aid in repair of wounded tissue. Serve as main communication between cells-- especially heart and embryos. Cell walls in plants: provide protection, maintain shape, resists expansion and prevents excessive influx of water, primary component is polysaccharide cellulose, cellulose micro fibril, approx.
