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Epithelial classifications

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slimage's version from 2016-09-22 20:33

Section 1

Question Answer
simple single layer of cells
stratifiedtwo or more layers of cells
squamous flattened and scale like
cuboidal box like , as tall as they are wide
columnar tall column shaped
what is stratified epithelial classified by ? apical layer
what is found in the ducts of larger glands((sweat and mammary) and very rare stratified cuboidal
describe stratified columnar ? occurs at junctions between cell types , small amounts in pharynx, male urethra and lining some glandular ducts
what is a gland ? one or more cells that make and secrete product
secretionaqueous fluid that contains proteins
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Section 2

Question Answer
what is the function of simple squamous tissue ? allow material to pass by diffusion , and secrete lubricating substances
where are squamous tissue located in the body ? kidney glomeruli , air sacs of the lungs, lining of heart, blood vessels , and lymphatic vessels
what is the function of simple cuboidal tissue ? secretion and absorption
where in the body are the cuboidal tissue located ?kidney tubules , ducts &secretory portions of small glands , ovary surface
what is the function of simple columnar tissue ? absorption , secretion of mucus , ciliated forms propel mucus
where are the ciliated forms of columnar tissue located in the body ? small bronchi , uterine tubes , and regions of the uterus
where are the nonciliated forms of columnar located in the body ? GI tract , gallbladder , some ducts
what are the functions of pseudostratified columnar ? secrete mucus , and propulsion of mucus by ciliary action
where are the nonciliated forms of pseudostratified columnar located ? males sperm carrying ducts , ducts of large glands
where are the ciliated forms of pseudostratified columnar located ?trachea , upper respiratory tract
what is the function of stratified squamous ? protects underlying tissues from abrasion
where are the nonkeratinized forms of stratified squamous located in the body ? esophagus , mouth , vagina
where are the keratinized forms of stratified squamous located in the body?skin
transitional epithelium functionstretches readily permitting storage of urine
where in the body is transitional epithelium located ?lines ureters , bladder , and urethra
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Section 3

Question Answer
endocrine glands internally secrete chemicals by exocytoosis
how do the hormones travel to their target organ ?via the blood stream
what is the only gland that is both an endocrine and exocrine pancreas
exocrine gland externally secreting products released onto body surfaces or into body cavities
what are the modes of secretion ? merocrine secretion , apocrine secretion , and holocrine secretion
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