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NEET MDS Quiz - Practice Test

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Practice Test

General Medicine - 3 Questions

1
General Medicine
A patient of known valvular disease requires dental extraction. Pretreatment prophylaxis should be given with
1) Tetracycline 1000 mg one hr before surgery
2) Amoxicillin 3 g orally one hour before
3) Amoxicillin 1g IM one hour before
4) None of the above

📝 Explanation:

Patients with valvular heart disease are at risk of infective endocarditis following dental procedures (like extraction) that cause bacteremia. To reduce this risk, antibiotic prophylaxis is recommended.

Preferred drug: Amoxicillin

Dose: 3 g orally, given 1 hour before the procedure

Alternative (if penicillin allergy): Clindamycin 600 mg orally 1 hour before

2
General Medicine

A 55-year-old male with a history of alcoholism presents with a chronic non-healing ulcer on his lower leg. The ulcer has a necrotic center surrounded by erythematous tissue. Which of the following is the most likely diagnosis?
1) Arterial ulcer
2) Venous stasis ulcer
3) Pressure ulcer
4) Neuropathic ulcer

📝 Explanation:

The chronic non-healing nature of the ulcer and its location on the lower leg in an individual with a history of alcoholism are more consistent with a neuropathic ulcer. Neuropathy due to chronic alcohol use can lead to loss of protective sensation and poor blood supply, resulting in these types of ulcers.

3
General Medicine

What is the primary mechanism of action of antihistamines in the management of anaphylaxis?
1) Blocking the release of mediators from mast cells
2) Directly counteracting the effects of histamine on H1 receptors
3) Acting on beta-2 adrenergic receptors to dilate bronchioles
4) Inhibiting the production of leukotrienes and prostaglandins

📝 Explanation:

Antihistamines, particularly H1 blockers, are used to counteract the vasodilatory and bronchoconstrictive effects of histamine in anaphylaxis.

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