BIOL-2220 Lecture Notes - Lecture 2: Sarcolemma, Extracellular Fluid, Exocytosis
23 Jan 2018
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Document Summary
A group of cells that together perform a specific function. All three body surfaces, outside of body is epithelial tissue. Glandular part that makes product that what leaves our body. Instead of glycoproteins being receptor site, its an anchoring site. Network of collagen, adds strength; helping make anchoring strong. Simple epithelial one cell layer in thickness. Found in areas that do not have much wear and tear . Stratified epithelial two or more cell layers. Pseudostratified only one cell layer but looks like more because the nuclei do not line up. Shape (name based on shape of apical cells) Line hollow internal storage cavities, stretch to increase cavity without stretch of tissue (ex: urinary bladder) changes shape. Cell or group of cells of specialized epithelium that secrete into ducts, onto surfaces or into the blood. Most of the substances are water based (if it"s a water based secretion, it requires energy to be.
