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apical membrane

   Also found in: Wikipedia 0.01 sec.
apical membrane,
the layer of plasma membrane on the apical side (the side toward the lumen) of the epithelial cells in a body tube or cavity, separated from the basolateral membrane by the zonula occludens.


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Despite an obvious cholesterol elevation, most excretory kidney functions, including organic anion excretion rate, are not influenced by the free cholesterol accumulation in proximal tubule cells, whereas some reabsorptive functions such as protein endocytosis and glucose reabsorption by the apical membrane appear to be vulnerable.
Fifteen cases of normal bladder epithelium (n = 15) demonstrated weak immunoreactivity for CD24 with well-confined localization in the apical cytoplasm or apical membranes (Figure 1, A through G, and Table 1).
In the thyroid gland, a disorder in the function of pendrin may cause diminished iodide transport over the apical membrane that results in iodide remaining in the thyrocyte and a consequent decrease of organification of iodide.
 
 
 
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