True or false: When blood is collected, drug molecules are in the water portion of blood.

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Study for the Pharmaceutics Drug Disposition Test. Prepare with flashcards and multiple choice questions, each answer has hints and explanations. Get set for your exam!

Multiple Choice

True or false: When blood is collected, drug molecules are in the water portion of blood.

Explanation:
The water portion refers to plasma, the liquid part of blood that is mostly water. When blood is drawn, drug molecules are present in this plasma phase, either freely dissolved or bound to plasma proteins. Binding to proteins doesn’t move the drug out of the plasma water; it simply changes the portion that is unbound versus bound, but both forms reside in the aqueous plasma environment. So the statement is true.

The water portion refers to plasma, the liquid part of blood that is mostly water. When blood is drawn, drug molecules are present in this plasma phase, either freely dissolved or bound to plasma proteins. Binding to proteins doesn’t move the drug out of the plasma water; it simply changes the portion that is unbound versus bound, but both forms reside in the aqueous plasma environment. So the statement is true.

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