Examlex
The researcher should rely on ________ to determine which variables should be investigated.
Microvilli
Small, fingerlike extensions of the plasma membrane of cells, increasing surface area for absorption.
Plicae Circularis
Internal folds of the intestinal lining that increase surface area for absorption of nutrients.
Absorption
The process by which substances are taken up from the environment and enter the bloodstream or cells.
Hepatic Portal Vein
Portal vein formed by the superior mesenteric and splenic veins and entering the liver.
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