Question

which of the following factors are part of the pharmacokinetics process of distribution? (select all that apply)
rate of blood flow
protein binding
1/2 life
urination
question 4
1 pts
which of the following factors are part of the pharmacokinetics process of metabolism? (select all that apply)
liver function
route of drug administration
reactions of many enzymes
the ph in the stomach

Explanation:

• First question (Distribution):
• Rate of blood flow: Affects how quickly a drug is distributed throughout the body. Higher blood flow to an organ means more drug can reach it.
• Protein binding: Drugs can bind to plasma proteins. Only unbound (free) drug is pharmacologically active and can distribute to tissues.
• Half - life ($1/2$ life): It is related to elimination (how long a drug stays in the body), not distribution.
• Urination: It is a part of the elimination process (excretion), not distribution.
• Second question (Metabolism):
• Liver function: The liver is the major organ for drug metabolism. Impaired liver function (e.g., in liver disease) can affect how drugs are metabolized.
• Reactions of many enzymes: Drug metabolism involves enzyme - catalyzed reactions (e.g., cytochrome P450 enzymes).
• Route of drug administration: It mainly affects absorption (e.g., oral, intravenous). For example, intravenous administration bypasses the first - pass metabolism (a form of absorption - related metabolism for oral drugs), but it is not a direct factor in the metabolic process itself.
• The pH in the stomach: It is relevant to drug absorption (e.g., for orally administered drugs, the pH can affect dissolution and ionization), not metabolism.

Answer:

• For the first question: Rate of blood flow, Protein binding
• For the second question: Liver function, Reactions of many enzymes