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Epithelium

WVSOM Class of 2012 Epithelium

QuestionAnswer
what layer separates the epithelium from the underlying connective tissue? basement membrane (basal lamina)
basal lamina and connective tissue form what? basement membrane
basement membrane functions? attachment, filtration, tissue compartmentalization, and confers cell polarity and shape
is basement membrane vascular? no
stratified cells differ from simple cells how? the stratified cells have multiple cells not attached to the basement membrane
simple squamous that lines the vascular system is called what? endothelium
simple squamous that lines the body cavities is called what? mesothelium
what type of simple squamous lines respiratory spaces? pneumocytes
where are simple cuboidal cells located? small ducts of exocrine glands and kidney tubules
where are simple columnar cells located? small intestine and colon, gallbladder, stomach and gastric glands
pseudostratified ciliated columnar epithelium cells all attach where? basement membrane
pseudostratified ciliated columnar epithelium cells located where? always have what feature? trachea and bronchi lining, lining of vas deferens, epididymis; always have cilia
stratified cuboidal/stratified columnar are found where? mammary, sweat glands, anorectal junction, and large ducts of exocrine glands
stratified squamous is found where? epidermis, lining of oral cavity/esophagus, lining of vagina (can be keratinized or non-keratinized)
transitional cells found where? renal calyces, bladder, urethra, ureter
endocrine glands have ducts or not? no
unicellular glands are composed of a single cell; give an example: goblet cells in tracheal epithelium
multicellular glands have what 2 portions? duct and secretory portions
goblet cells secrete what? mucus
serous secretions consist of what? example? watery secretions rich in enzymes; parotid
mixed secretions make what two things? example? mucus and serous; submandibular gland
serous glands stain what color? pink
mucus glands stain what color? clear
cells that release their contents by exocytosis? example? merocrine; parotid gland
part of the secretory cell apical cytoplasm is released along with the contents? example? apocrine; mammary gland
entire secretory cell and contents released? example? holocrine; sebaceous gland
benign epithelial neoplasms are called what? adenomas
malignant epithelial neoplasms that arise from any sheet-like or glandular epithelia? carcinoma
malignant epithelial neoplasms that arise from glandular tissue? adenocarcinoma
what are the primary functions of epithelium? diffusion, transport, absorption, secretion
what kind of tissue lines the bowman's capsule simple squamous
transformation of one cell type to another: metaplasia
is metaplasia reversible? yes
an abnormality in the appearance of cells indicative of an early step towardstransformation into a neoplasia: dysplasia
benign epithelial neoplasm that arises from surface epithelia? polyp
Created by: mhassan