Q- A 64-year-old man with atrial fibrillation is started on warfarin therapy. After 3 days, he develops skin necrosis.
Which of the following best explains this complication?
A- Direct inhibition of thrombin
B- Immediate depletion of clotting factors II, VII, IX, X
C- Rapid decline in protein C leading to transient hypercoagulability
D- Vitamin K deficiency before therapy
Q- A 40-year-old man with peptic ulcer disease is started on omeprazole.
Which of the following is the primary mechanism of action of this medication?
A- Blocks H₂ receptors on gastric parietal cells
B- Irreversibly inhibits the H⁺/K⁺-ATPase pump in parietal cells
C- Neutralizes gastric acid by chemical reaction
D- Stimulates prostaglandin receptors in the gastric mucosa
Q- A 25-year-old woman with asthma presents to the emergency department with shortness of breath. She is given an inhaled medication that acts by stimulating β₂-adrenergic receptors, leading to smooth muscle relaxation in the bronchi.
Which of the following drugs was most likely administered?
A- Albuterol
B- Ipratropium
C- Propranolol
D- Theophylline
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