IPHY 3410 Study Guide - Midterm Guide: Stratified Squamous Epithelium, Epithelial Root Sheath, Fibrodysplasia Ossificans Progressiva
22 Sep 2016
School
Department
Course
Professor
Document Summary
Special characteristics of epithelial tissues: cellularity: little extracellular space, cell junctions, polarity: apical and basal surface, supported by connective tissue, avascular, innervated, regeneration-highest capacity to replace cells. Epithelial cell surface features: lateral surface features: Cell junctions: tight junctions, desmosomes, gap junctions: basal surface features: Basal lamina: non-cellular sheet of proteins that provides surface for new cells to build on: apical surface features: Microvilli: folds of plasma membrane of moist epithelial tissue that increases surface area for absorption. Cilia: whip like, motile extensions of a cell surface. Major categories: membranous: majority of body coverings and linings, glandular: specialized tissue for glandular secretions. Protection from pathogens, physical injury, toxins, desiccation: if covering or lining. Diffusion of gases: pulmonary alveoli in lungs. Simple columnar epithelium: secretion, absorption, secretion, absorption, secretion, movement. Mucus in respiratory system for epithelium: movement both. Glandular ducts (salivary ducts: protection, secretion, expansion. Allows bladder to expands as it fills with urine.
