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Questions and Answers
What is the main characteristic that hydrophilic drugs must have for proper elimination?
What is the main characteristic that hydrophilic drugs must have for proper elimination?
How does impaired kidney function affect the elimination of hydrophilic drugs?
How does impaired kidney function affect the elimination of hydrophilic drugs?
What is a consequence of having hydrophilic drugs that are not eliminated properly?
What is a consequence of having hydrophilic drugs that are not eliminated properly?
Which factor is crucial for the elimination of drugs through the kidneys?
Which factor is crucial for the elimination of drugs through the kidneys?
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What type of drugs is primarily eliminated by the kidney?
What type of drugs is primarily eliminated by the kidney?
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Which organ is primarily responsible for renal excretion?
Which organ is primarily responsible for renal excretion?
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What is one route of excretion that does not involve the kidneys?
What is one route of excretion that does not involve the kidneys?
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Which method of excretion is least likely to occur in patients with kidney impairment?
Which method of excretion is least likely to occur in patients with kidney impairment?
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Which of the following substances is excreted through the skin?
Which of the following substances is excreted through the skin?
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Which type of excretion involves the removal of substances in saliva?
Which type of excretion involves the removal of substances in saliva?
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What does pharmacokinetics primarily study?
What does pharmacokinetics primarily study?
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Which of the following components is NOT part of pharmacokinetics?
Which of the following components is NOT part of pharmacokinetics?
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The term 'kinesis' in pharmacokinetics refers to which process?
The term 'kinesis' in pharmacokinetics refers to which process?
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Which two elements combine to form the term pharmacokinetics?
Which two elements combine to form the term pharmacokinetics?
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Which aspect of pharmacokinetics focuses on how a drug is processed after administration?
Which aspect of pharmacokinetics focuses on how a drug is processed after administration?
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Which factor does NOT affect drug absorption from the gastrointestinal tract?
Which factor does NOT affect drug absorption from the gastrointestinal tract?
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Which of the following is considered a pharmaceutical factor affecting drug absorption?
Which of the following is considered a pharmaceutical factor affecting drug absorption?
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What is a biological factor that impacts drug absorption from the gastrointestinal tract?
What is a biological factor that impacts drug absorption from the gastrointestinal tract?
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Which of the following factors would NOT be classified under physicochemical factors?
Which of the following factors would NOT be classified under physicochemical factors?
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Which statement about factors affecting drug absorption is accurate?
Which statement about factors affecting drug absorption is accurate?
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Which factor is primarily concerned with how quickly a drug dissolves in the gastrointestinal tract?
Which factor is primarily concerned with how quickly a drug dissolves in the gastrointestinal tract?
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What aspect of drug properties relates to the interaction with other substances in the gastrointestinal tract?
What aspect of drug properties relates to the interaction with other substances in the gastrointestinal tract?
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What property primarily affects the manner in which a drug breaks down in the gastrointestinal tract?
What property primarily affects the manner in which a drug breaks down in the gastrointestinal tract?
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Which of the following factors does NOT belong to the category of physicochemical factors?
Which of the following factors does NOT belong to the category of physicochemical factors?
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What does a higher drug dissociation constant typically indicate about a drug's absorption?
What does a higher drug dissociation constant typically indicate about a drug's absorption?
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Study Notes
Pharmacokinetics
- Pharmacokinetics is the study of how a drug moves through the body. It involves the study of absorption, distribution, metabolism, and excretion.
- Pharmacokinetics is important for all routes of administration except intravenous injection.
Absorption
-
Factors affecting drug absorption:
-
Biological factors:
- Surface area of the GI tract
- pH of the gastrointestinal system
- GI motility (peristalsis)
- Liver metabolism (first-pass effect)
- Presence of food, diseases
-
Physiochemical factors:
- Drug dissociation constant (pKa)
- Lipid solubility
- Dissolution rate
- Drug stability
- Drug interactions
-
Pharmaceutical factors:
- The dosage form of the drug
-
Biological factors:
Excretion
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Routes of excretion:
- Kidneys (renal excretion)
- Bile (biliary excretion)
- Lungs (pulmonary excretion)
- Saliva (salivary excretion)
- Milk (mammary excretion)
- Sweat (skin excretion)
-
Hydrophilic drugs:
- These are more readily excreted by the kidneys.
- Patients with kidney dysfunction may have a reduced ability to eliminate these drugs.
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Description
This quiz covers the essential concepts of pharmacokinetics, including drug absorption, distribution, metabolism, and excretion. Understand the factors influencing drug absorption and the various routes of drug excretion to enhance your knowledge in pharmacology.
