Chapter 10: Preclinical Studies Flashcards
An ideal drug is potent, efficacious, and specific. True or false?
True
No drugs are perfectly effective and absolutely safe in reality. True or false?
True
What is the study of drug movement throughout the body?
Pharmacokinetics
The processes of pharmacokinetics are grouped into four categories:
Absorption
Distribution
Metabolism
Excretion
What are the four basic transport mechanisms?
Passive diffusion
Facilitated diffusion
Active transport
Pinocytosis
What is passive diffusion?
Diffusion is the random movement of molecules in fluid.
What is facilitated diffusion?
Polar drug molecules have been observed across cell membranes via carrier systems.
What is active transport?
The active transport mechanism requires energy to drive the transportation of drugs against the concentration gradient from low to high.
What is pinocytosis?
This involves engulfing of fluids by a cell.
Absorption is the primary pharmacokinetic factor determining the length of time it takes a drug to produce its effect. True or false?
True.
Distribution involves the transport of drugs throughout the body. True or false?
True
The primary site of drug excretion is the kidney. True or false?
True
Certain drugs may be excreted more quickly, if the pH of the filtrate changes. True or false?
True
Impairment of kidney function can dramatically affect pharmacokinetics. True or false?
True
Glandular activity is another elimination mechanism. True or false?
True
What do toxicological studies show?
The functional and morphological effects of the drug
The two types of toxicity studies are:
Single-dose and repeated dose
Single dose toxicity tests are:
Acute toxicity testing is conducted for several purposes:
Determination of repeated doses
Identification of organs subjected to toxicity
Provision of data for starting doses in human clinical trials
Repeated dose toxicity tests are:
Chronic toxicity studies are also performed on two species, a rodent, and a non-rodent. The aim is to evaluate the longer term effects of the drug in animals.
Carcinogenicity studies are carried out to identify the tumor causing potential of a drug. True or false?
True
Genotoxicity studies determine if the drug compound can induce mutations to genes. True or false?
True
Reproductive toxicology studies are to assess the effect of the potential drug on mammalian reproduction. True or false?
True
T 1/2 is:
Plasma half life
The longer it takes a medication to be excreted the greater the half life. True or false?
True