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Consider the following reaction. (R, R', and R'' represent different hydrocarbon chains.) Which of the following correctly describes this reaction?
Ducts
Tubes, channels, or passages in the body or in a machine that convey fluid or air from one location to another.
Interstitial Fluid
Fluid that surrounds the body’s cells; consists of dissolved substances that leave the blood capillaries by filtration and diffusion.
Metabolism
The set of life-sustaining chemical reactions in organisms to convert food into energy, and build or maintain their cells.
First Messenger
Chemical signal, such as a peptide hormone, that binds to a plasma membrane receptor protein and alters the metabolism of a cell because a second messenger is activated.
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