Secrete

... in the body (after all, there's billions of them) - this could be due to simple mutation in some essential gene, after which the cell cannot secrete some essential protein (like insulin for example) but is otherwise viable. However, I haven't heard that there'd be so many of those cells that ...

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... some fucntion y for the body do it. For example not all well-developed cells of the islets-of-langerhans synthesise insulin, not all liver cells secrete bile etc etc I know nothing worthy of mentioning about biology but thought you guys could say if he is right. Thanks.

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... be delivered to the place where it can 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 is taken into the blood. You want to get the insulin into the blood, and not into the epithelial cells that make ...

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Not so. Not most ingested enzymes will be denatured and destroyed upon entering the stomache. Stomach acids do not secrete until the food is ingested and takes a couple of minutes to "gear up" for the meal coming (acinar cells and pancreatic juices). Setting the denature ...

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Not so. Not most ingested enzymes will be denatured and destroyed upon entering the stomache. Stomach acids do not secrete until the food is ingested and takes a couple of minutes to "gear up" for the meal coming (acinar cells and pancreatic juices). Also as the food hits ...

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