Epithelial cells

For Biology we are supposed to interview an expert on the subject of cells. No expert answered me so I decided to post my questions on here. Feel free to answer them it would be greatly appreciated. 1.) What exactly are epithelial cells? 2.) Are there different types of epithelial cells? 3.) What ...

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... the nutrients giving off glucose molecules that then transport thru the epithelial cells of the GI tract to the blood) it can then bind to a receptor on the islets of Langerhans ...

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... do the most good. The body specifically makes the insulin in the beta cells of the pancreas, and exocytosis/secretes it into the capillaries and ... the blood. You want to get the insulin into the blood, and not into the epithelial cells that make up the GI tract. I do not know if there is a receptor ...

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... that. Like how to block fibrosis (scar tissue formation) and proceed to epithelial cells disengaging from the basement membrane and sliding over the wound opening. Dedifferentiation ...

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... with each other. (a) When epidermal growth factor (EGF) is added to epithelial cells, the Ras and Raf proteins are both activated. From this observation by itself, what conclusion ...

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