WorksheetsPharmacokinetics Quiz
Total questions: 15
Worksheet time: 5mins
Which of the following statements is TRUE about lipophilic (fat-soluble) drugs?
They have difficulty crossing cell membranes.
They stay mostly in the blood and are quickly eliminated.
They easily cross cell membranes and accumulate in fatty tissues.
They bind only to water-based proteins in the blood.
What happens when a drug binds strongly to plasma proteins like albumin?
It becomes more active and quickly enters tissues.
It is rapidly eliminated from the body.
It becomes inactive and stored temporarily in the bloodstream.
It causes immediate toxic effects.
Why can taking multiple drugs that bind to plasma proteins be risky?
The drugs will no longer be absorbed.
The body will reject the extra drugs.
It can increase the amount of free drug in the blood, leading to toxicity.
All drugs will be eliminated through the skin.
What do physiological barriers do?
Let all drugs enter the body
Protect organs from drug exposure
Help drugs work faster
Remove drugs from the body
In which type of drug kinetics is the rate of elimination constant, no matter the drug concentration?
First-order kinetics
Zero-order kinetics
Half-life kinetics
All of the above
Which of the following organs receives drugs more quickly due to high perfusion rates?
Muscle
Skin
Brain
Fat
Which type of capillary structure restricts drug passage, particularly in the brain?
Porous capillaries
Fenestrated capillaries
Tight junctions
Sinusoidal capillaries
Which of the following drugs would likely have a low Vd?
Highly protein-bound drugs
Highly lipid-soluble drugs
Drugs with fast metabolism
Drugs with slow absorption
Which statement best describes the one-compartment model in pharmacokinetics?
The drug distributes into central and peripheral compartments at different rates.
The drug is assumed to distribute instantly and uniformly in a single compartment.
The drug requires cytochrome P450 metabolism before distribution occurs.
The drug distributes only to peripheral tissues like muscles and fat.
In the two-compartment model, the peripheral compartment mainly represents:
Highly perfused tissues like the liver and kidneys
Plasma and blood
Poorly perfused tissues like muscles and fat
The site of drug elimination
Which of the following is a Phase I reaction in drug metabolism?
Glucuronidation
Acetylation
Oxidation
Methylation
The main purpose of Phase I reactions is to:
Conjugate drugs with hydrophilic groups
Make drugs more polar to prepare for Phase II metabolism
Directly eliminate the drug through urine
Store drugs in fat tissues for later use
Which of the following is an example of a Phase II reaction?
Hydrolysis
Reduction
Sulfate Conjugation
Oxidation
A high Vd usually means the drug is:
Confined to the blood only
Highly water-soluble
Highly lipid-soluble and widely distributed in tissues
Metabolized quickly
What does Volume of Distribution (Vd) represent?
The actual size of the liver
How widely a drug is distributed in the body
The speed of drug metabolism
The kidney’s filtration rate
