BIOC32H3 Lecture Notes - Lecture 2: Capillary, Goose Bumps, Eponychium
Document Summary
Lecture 3 the integumentary system (based on chapters 2 and 4) Ions, glucose, amino acids, regulatory molecules and other small solutes pass through. Common in epithelial cells where they help coordinate the beating of cilia and in muscles where they coordinate muscle contraction. These are very strong linkages and they can resist stretching and twisting. Linkages occur via cell adhesion molecules (cams) which bind to each other and to other extracellular materials and proteoglycans that link the opposing membranes and form a junction with the cytoskeleton within the adjoining cells. Riddle: what organ weighs about 54 kg and measures 1-2 m2 (large surface area and same wt as head) Integument = skin, uses 2 types of tissue: Epithelial on surface, protects underlying body layers or lines body cavities, composed of one or more layers of closely packed cells, little or no extracellular matrix cells and no blood vessels within.
