Organic compounds Biological macromolecules

After absorption, a chemical compound enters the circulation, which transfers it to all parts of the body. After this phase, the most important factor affecting the distribution is the passage of the compound through biological membranes. From the point of view of the distribution of a chemical compound, the organism can be divided into three different compartments (1) the plasma compartment (2) the intercellular compartment and (3) the intracellular compartment. In all these compartments, a chemical compound can be bound to biological macromolecules. The proportion of bound and unbound (free) chemical compound depends on the characteristics of both the chemical... 

Direction 5. Physical processes, such as partial or complete photochemical modification of organic macromolecules, can result in major alterations in biological availability of portions of complex, heterogeneous dissolved organic compounds. These photochemical processes can result in the following changes ... 

The rest of this book is devoted to organic compounds of biological importance. Many of these are macromolecules. We shall find that, just as the technological function of a macromolecule—fiber, elastomer, plastic—depends on its structure, so does the biological function to hold the organism together, to nourish it, to control it, to allow it to reproduce itself. 

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