Pharmacology Test Bank
Study Guide 2026/2027
⭐ Accurate Questions with Correct Detailed Solutions |
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The pKa (for the COOH group) of each of the three drugs is as follows: thyroxine = 3.0,
mesothyroxine = 4.0, neothyroxine = 5.0. Of these, which will be absorbed to the
greatest extent from the stomach (pH = 1.0)? - ANSWER ✅✅✅✅neothyroxine
The multi drug resistance proteins (or p-glycoproteins) can protect liver and kidney cells
by exporting harmful chemicals against a concentration gradient in an energy-
dependent manner. What is this called? - ANSWER ✅✅✅✅active transport
Phase II conjugates typically have the following property/properties - ANSWER
✅✅✅✅rapidly excreted in the urine
A drug with a half-life of 2 hours is administered by continuous intravenous infusion.
How long will it take for the drug to reach 50% of its steady state concentration? -
ANSWER ✅✅✅✅2 hours
Caffeine is eliminated primarily by metabolism and with first order kinetics. The half-life
of caffeine varies significantly with individuals, but is on average 5.0 hours. The volume
of distribution is 0.60 L/kg. Joe has a mass of 70 kg and is an average subject with
regard to caffeine pharmacokinetics. He has a regular habit of consuming a cup of
coffee (85 mg of caffeine) at 8 am.
What is the clearance value (CL) of caffeine in a normal individual? - ANSWER
✅✅✅✅0.083 L/hr/kg
Which of the following routes is most likely to be affected by the first-pass effect? -
ANSWER ✅✅✅✅oral
, A drug, given as a 150 mg single dose, results in a peak plasma concentration of 10
ug/mL. The apparent volume of distribution is (rapid distribution and negligible
elimination prior to measuring the peak plasma level): - ANSWER ✅✅✅✅15 L
Which of the following are routes of drug clearance?
-renal
-sweat
-intestines - ANSWER ✅✅✅✅all of the above
What factor(s) may reduce drug bioavailability?
-gastric acid instability
-first-pass affect
-exposure to digestive enzymes - ANSWER ✅✅✅✅all of the above
What type of receptor is the muscarinic receptor? - ANSWER ✅✅✅✅G-protein
coupled receptor
For a cholinesterase modified by an organophosphate compound (e.g. soman), what is
the time-dependent dealkylation process called yielding an enzyme refractory toward
reactivation? - ANSWER ✅✅✅✅aging
Muscarinic receptors bind - ANSWER ✅✅✅✅acetylcholine
Which of the following is a clinical use for a muscarinic agonist? - ANSWER
✅✅✅✅"switching on" the urinary tract after surgery
Indirect cholinergic agonists cause - ANSWER ✅✅✅✅inhibition of
acetylcholinesterase and a corresponding increase in the synaptic acetylcholine levels
Which of the following is characteristic of the sympathetic nervous system? - ANSWER
✅✅✅✅responded predominate during physical activity or when experiencing fright
A patient with an acute attack of glaucoma is treated with pilocarpine. The primary
reason for its effectiveness in this condition is its: - ANSWER ✅✅✅✅ability to lower
intraocular pressure
Put the following steps in the correct order for neurotransmission at the cholinergic
neuron - ANSWER ✅✅✅✅1. acetylcholine is synthesized from choline and acetyl-CoA
2. acetylcholine is released from storage vesicles into the synaptic cleft
3. acetylcholine is synthesized from choline and acetyl-CoA
4. acetylcholine is degraded by acetylcholinesterase
The autonomic nervous system innervates all of these except - ANSWER
✅✅✅✅skeletal muscle