Repeated USMLE Questions- Pharmacology- 268

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Q- Atropine is often used prior to administration of inhalant anesthetics to reduce which of the following?

A- Heart rate

B- Muscle tone

C- Secretions

D- Vomiting

C- Secretions- Atropine is given before anesthesia to dry up body fluids like saliva and mucus. This helps keep the airways clear during surgery and prevents breathing problems caused by too much mucus.



Q- Which of the following is the most significant action of monoamine oxidase A?

A- Metabolism of dopamine

B- Metabolism of norepinephrine, serotonin and tyramine

C- Metabolism of serotonin and epinephrine

D- Metabolism of serotonin and dopamine

B- Metabolism of norepinephrine, serotonin and tyramine- Monoamine oxidase A is an enzyme that helps break down certain brain chemicals, especially norepinephrine, serotonin and tyramine.  This is important for regulating mood and blood pressure.



Q- All of the following are currently used in hyperthyroidism EXCEPT?

A- Diatrizoate sodium

B- Methimazole

C- Potassium perchlorate

D- Propylthiouracil

C- Potassium perchlorate- Potassium perchlorate is not commonly used anymore for hyperthyroidism because of its toxicity (especially risk of aplastic anemia).



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10 thoughts on “Repeated USMLE Questions- Pharmacology- 268”

  1. Thank you so much. I hope it helps you in your medical career.

  2. It’s really wonderful
    It’s so amazing

  3. Thanks so much Dr Lucie for your feedback.

  4. Thank you , really helpful.

  5. I will. Thank you for your feedback.

  7. I post everyday, I hope it helps. Thank you and good luck.

  9. I will post more. Thank you

  10. I really love it still need more of the pharmacology mcq
    Thanks

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