Repeated USMLE Questions Step 1- Review- 30

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Q- Bronchoconstriction results from stimulation of which one of the following receptor types?

A- Alpha-1- adrenergic receptors

B- Beta-2- adrenergic receptors

C- M2 cholinergic receptors

D- M3 cholinergic receptors

D- M3 cholinergic receptors- They cause stimulation of bronchiolar smooth muscles which leads to bronchoconstriction and pulmonary obstructive symptoms. There are no alpha adrenergic or M2 receptors in the lungs. Beta-2-adrenergic receptors’ stimulation causes bronchodilation.



Q- A 72-year-old woman presents for her routine examination. She is healthy and exercising regularly. Her weight is 145 lb. and her height is 5’5. She has a family history of breast cancer. Her pulse is 70/min and blood pressure is 120/80. Her lipid panel is within normal limits.

Which one of the following is the most likely risk factor to develop atherosclerosis in this woman?

A- Age

B- Blood pressure

C- Exercise

D- Family history of breast cancer

E- Weight

A- Age- Her age is the only risk factor for her but her healthy lifestyle can negate this risk.



Q- Which one of the following cardiac conditions occurs in about 25% of patients with systemic lupus erythematosus (SLE)?

A- Aortic stenosis

B- Atrial hypertrophy

C- Pericarditis

D- Ventricular myxoma

C- Pericarditis- It is seen in 25% of patients with SLE. It is characterized by pleuritic chest pain and pericardial friction rub. Other choices can occur but not as common as pericarditis.



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8 thoughts on “Repeated USMLE Questions Step 1- Review- 30”

  1. I am starting to post more questions. Sorry, I was very busy last month. Thanks Dr. Akinrinlola.

  2. Thanks our Teacher..we need more questions

  3. Thank you dear doctor.

  5. Thank you so much Dr. Abdullah.

  6. Best sir

  7. I am trying to add questions whenever I have time. Thank you dear Dr. for your visits.

  8. Nice but I need lots of question

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