ANP 1105 Study Guide - Gastrointestinal Tract, Microvillus, Glycoprotein
Document Summary
Epithelial tissue: sheet of cells that covers a body surface or lines a body cavity: covering and lining epithelium: outer walls of stomach, anywhere with a lumen, glandular epithelium: to be covered later. Functions: protection, physical (boundaries, mechanical, chemical (secretion to protect against drying out) d. Infectiious (breathing in air that is not pure: gi tract (breaks down the products of digestion and moves them into the blood, kidney (blood flows through the capillaries and the fluid that comes out becomes urine. Barrier between blood and urine fluid is epithelial layer: absorbtion stream, filtration, excretion, secretion, kidney, glands, sensory reception (generally associated with neurons, taste buds, olfactory membranes (smell) Strucctural characteristics: cellularity, cell dense tissue, different from other tissue (connective tissue has fibre in it, epithelium is made of many rows of cells with no spaces/fibres/secreted material, specialized contacts, tight junctions, polarity i. Made of glycoprotein: noncellular, underlying supportive sheet of primarily glycoproteins, funtions, attachment site for epithelium cells ii.