Which of the following routes has a bioavailability (F) of 1 by definition?
A. Oral
B. Inhalation
C. Intramuscular
D. Intravenous
D. Intravenous (IV) administration directly enters the bloodstream, so bioavailability is 100%, or F = 1.
What is the volume of distribution (Vd) best described as?
A. A real anatomical volume in the body
B. The volume of blood cleared of the toxicant per hour
C. An apparent volume in which the xenobiotic is distributed
D. The plasma concentration of a drug at time zero
C. Volume of distribution (Vd) is an apparent volume that relates the amount of drug in the body to the plasma concentration.
Which factor can reduce oral bioavailability (F)?
A. Rapid renal excretion
B. Complete absorption in GI tract
C. Extensive first-pass metabolism
D. Delayed gastric emptying
C. First-pass metabolism in the intestine or liver can reduce the amount of active drug reaching systemic circulation.
Which factor can reduce oral bioavailability (F)?
A. Rapid renal excretion
B. Complete absorption in GI tract
C. Extensive first-pass metabolism
D. Delayed gastric emptying
C. First-pass metabolism in the intestine or liver can reduce the amount of active drug reaching systemic circulation.
Which factor can reduce oral bioavailability (F)?
A. Rapid renal excretion
B. Complete absorption in GI tract
C. Extensive first-pass metabolism
D. Delayed gastric emptying
C. First-pass metabolism in the intestine or liver can reduce the amount of active drug reaching systemic circulation.
Which factor can reduce oral bioavailability (F)?
A. Rapid renal excretion
B. Complete absorption in GI tract
C. Extensive first-pass metabolism
D. Delayed gastric emptying
C. First-pass metabolism in the intestine or liver can reduce the amount of active drug reaching systemic circulation.
What does ‘T1/2’ represent in toxicokinetics?
A. Time to reach maximum concentration
B. Area under the curve
C. Clearance rate of a chemical
D. Time to eliminate 50% of the chemical
D. T1/2 is the half-life, or the time it takes for 50% of the chemical to be eliminated from the body.
What does ‘T1/2’ represent in toxicokinetics?
A. Time to reach maximum concentration
B. Area under the curve
C. Clearance rate of a chemical
D. Time to eliminate 50% of the chemical
D. T1/2 is the half-life, or the time it takes for 50% of the chemical to be eliminated from the body.
What does the term ‘bioavailability (F)’ refer to in toxicokinetics?
A. The rate at which a chemical is metabolized
B. The extent of absorption of a toxicant into systemic circulation
C. The elimination half-life of a toxicant
D. The time taken for maximum plasma concentration
B. Bioavailability (F) refers to the fraction of the administered dose of a toxicant that reaches the systemic circulation.
What is the volume of distribution (Vd) best described as?
A. A real anatomical volume in the body
B. The volume of blood cleared of the toxicant per hour
C. An apparent volume in which the xenobiotic is distributed
D. The plasma concentration of a drug at time zero
C. Volume of distribution (Vd) is an apparent volume that relates the amount of drug in the body to the plasma concentration.
What is the volume of distribution (Vd) best described as?
A. A real anatomical volume in the body
B. The volume of blood cleared of the toxicant per hour
C. An apparent volume in which the xenobiotic is distributed
D. The plasma concentration of a drug at time zero
C. Volume of distribution (Vd) is an apparent volume that relates the amount of drug in the body to the plasma concentration.
What is the volume of distribution (Vd) best described as?
A. A real anatomical volume in the body
B. The volume of blood cleared of the toxicant per hour
C. An apparent volume in which the xenobiotic is distributed
D. The plasma concentration of a drug at time zero
C. Volume of distribution (Vd) is an apparent volume that relates the amount of drug in the body to the plasma concentration.
What is the volume of distribution (Vd) best described as?
A. A real anatomical volume in the body
B. The volume of blood cleared of the toxicant per hour
C. An apparent volume in which the xenobiotic is distributed
D. The plasma concentration of a drug at time zero
C. Volume of distribution (Vd) is an apparent volume that relates the amount of drug in the body to the plasma concentration.
What does the term ‘bioavailability (F)’ refer to in toxicokinetics?
A. The rate at which a chemical is metabolized
B. The extent of absorption of a toxicant into systemic circulation
C. The elimination half-life of a toxicant
D. The time taken for maximum plasma concentration
B. Bioavailability (F) refers to the fraction of the administered dose of a toxicant that reaches the systemic circulation.
What does ‘T1/2’ represent in toxicokinetics?
A. Time to reach maximum concentration
B. Area under the curve
C. Clearance rate of a chemical
D. Time to eliminate 50% of the chemical
D. T1/2 is the half-life, or the time it takes for 50% of the chemical to be eliminated from the body.
Which factor can reduce oral bioavailability (F)?
A. Rapid renal excretion
B. Complete absorption in GI tract
C. Extensive first-pass metabolism
D. Delayed gastric emptying
C. First-pass metabolism in the intestine or liver can reduce the amount of active drug reaching systemic circulation.
What does the term ‘bioavailability (F)’ refer to in toxicokinetics?
A. The rate at which a chemical is metabolized
B. The extent of absorption of a toxicant into systemic circulation
C. The elimination half-life of a toxicant
D. The time taken for maximum plasma concentration
B. Bioavailability (F) refers to the fraction of the administered dose of a toxicant that reaches the systemic circulation.
What does ‘T1/2’ represent in toxicokinetics?
A. Time to reach maximum concentration
B. Area under the curve
C. Clearance rate of a chemical
D. Time to eliminate 50% of the chemical
D. T1/2 is the half-life, or the time it takes for 50% of the chemical to be eliminated from the body.
What does the term ‘bioavailability (F)’ refer to in toxicokinetics?
A. The rate at which a chemical is metabolized
B. The extent of absorption of a toxicant into systemic circulation
C. The elimination half-life of a toxicant
D. The time taken for maximum plasma concentration
B. Bioavailability (F) refers to the fraction of the administered dose of a toxicant that reaches the systemic circulation.
What does the term ‘bioavailability (F)’ refer to in toxicokinetics?
A. The rate at which a chemical is metabolized
B. The extent of absorption of a toxicant into systemic circulation
C. The elimination half-life of a toxicant
D. The time taken for maximum plasma concentration
B. Bioavailability (F) refers to the fraction of the administered dose of a toxicant that reaches the systemic circulation.
Which factor can reduce oral bioavailability (F)?
A. Rapid renal excretion
B. Complete absorption in GI tract
C. Extensive first-pass metabolism
D. Delayed gastric emptying
C. First-pass metabolism in the intestine or liver can reduce the amount of active drug reaching systemic circulation.
What does the term ‘bioavailability (F)’ refer to in toxicokinetics?
A. The rate at which a chemical is metabolized
B. The extent of absorption of a toxicant into systemic circulation
C. The elimination half-life of a toxicant
D. The time taken for maximum plasma concentration
B. Bioavailability (F) refers to the fraction of the administered dose of a toxicant that reaches the systemic circulation.
What is the volume of distribution (Vd) best described as?
A. A real anatomical volume in the body
B. The volume of blood cleared of the toxicant per hour
C. An apparent volume in which the xenobiotic is distributed
D. The plasma concentration of a drug at time zero
C. Volume of distribution (Vd) is an apparent volume that relates the amount of drug in the body to the plasma concentration.
What is the volume of distribution (Vd) best described as?
A. A real anatomical volume in the body
B. The volume of blood cleared of the toxicant per hour
C. An apparent volume in which the xenobiotic is distributed
D. The plasma concentration of a drug at time zero
C. Volume of distribution (Vd) is an apparent volume that relates the amount of drug in the body to the plasma concentration.
