BIOM 4070 Study Guide - Quiz Guide: Large Intestine, Cell Junction, Salivary Gland
28 Sep 2016
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Glandular epithelia are infoldings of line epithelia, specialized for secretion. Basal surface: anchored to basal lamina which holds cells to connective tissue. Different make up inside the cell at each end depending on cell activity. For stratified (multi-layer) cells, the top-most cell layer is the apical end, use this layer to classify. Pseudostratified = single layer that appears multi-layered due to uneven distribution of nuclei, only in respiratory system, always have cilia, only columnar. Columnar: tall, height > width, nuclei towards basal surface. Transitional: only in urinary tract, different cell types as you move from basal to apical layers. Cilia: thread-like, wispy, only in respiratory tract, move material along free surface. Microvilli: velvet appearance, smaller than cilia, do not move, increase sa. Keratin: layers of dead cells to provide protection, only stratified squamous cells have keratin. Exocrine glands have ducts that empty directly into cavity/surface. Branched tubular (secretory part is branched, not duct part!)
