77 Best USMLE Questions and Answers (Q&A) - ProProfs Discuss

Which of the following would be an example of a receptor that functions in this manner?

John Smith
Answered: Apr 28, 2024

Muscarinic acetylcholine receptor-the correct answer is d. the muscarinic acetylcholine receptor, as well as the 1-adrenergic and histamine1 receptors, activates phospholipase c to cleave...Read More

1 Answer

261 views

What initiates atherosclerosis?

John Smith
Answered: Apr 28, 2024

Injury to the endothelium -atherosclerosis is initiated by damage to the endothelial cells, which exposes the subjacent connective tissue (subendothelium). the loss of the antithrombogenic...Read More

1 Answer

260 views

What is the most likely result for this patient? A 4-year-old child whose family arrived in the United States from China last month is brought to the pediatrician for a checkup. On physical...

Chachelly
Answered: Apr 28, 2024

D

The correct answer is D. This patient is likely suffering from endemic cretinism due to a deficiency in dietary iodine, a disorder that is still common in parts of the world, including...Read More

1 Answer

258 views

What rises through the neural crest?

John Smith
Answered: Apr 28, 2024

Sensory neurons of the cranial ganglia -the neural crest forms most of the peripheral nervous system, in contrast to the neural tube, which is the embryonic source of the central nervous system. the...Read More

1 Answer

258 views

What tumor-suppressor protein is targeted by the virus causing this patient’s rectal cancer? A 37-year-old HIV-positive man presents for evaluation of anogenital lesions. He states that the...

Chachelly
Answered: Apr 28, 2024

P53

The correct answer is E. This HIV-positive patient has multiple anogenital warts, or condylomata acuminata, which are commonly caused by human papilloma virus (HPV) types 6 and 11. A...Read More

1 Answer

253 views

Which of the following organisms is most likely to be the cause of the patient's diarrhea? A 24-year-old AIDS patient develops chronic abdominal pain, low-grade fever, diarrhea, and...

Chachelly
Answered: Apr 28, 2024

Isospora belli

The correct answer is D. All of the organisms listed are protozoa. There are two intestinal protozoa specifically associated with AIDS that can cause transient diarrhea in...Read More

1 Answer

247 views

Which of the following is the most likely causative organism? A 60-year-old alcoholic smoker abruptly develops high fever, shakes, a severe headache, and muscle pain. Heinitially has a dry,...

Chachelly
Answered: Apr 28, 2024

Legionella pneumophila

The correct answer is A. The patient has a severe, potentially fatal, pneumonia with prominent systemic symptoms. Culture on BCYE is the specific clue that the...Read More

1 Answer

247 views

Which genetic phenomena is the most likely diagnosis? A 3-year-old developmentally delayed girl presents to the pediatric neurologist for evaluation of new onset seizures. The parents are also...

Chachelly
Answered: Apr 28, 2024

Imprinting

The correct answer is C. This child most likely has Angelmans syndrome. Individuals with this phenotype have a characteristic facies with microcephaly, maxillary hypoplasia,...Read More

1 Answer

244 views

Which of the following is a common adverse effect of this medication?

John Smith
Answered: Apr 28, 2024

Vasomotor flushes-the correct answer is d. clomiphene acts by binding estrogen receptor sites in the hypothalamus and blocking the negative feedback of circulating estrogens. this results in...Read More

2 Answers

241 views

Which class of drugs is most likely to suppress his chemotherapy-related nausea? A 22-year-old white man with metastatic testicular carcinoma is undergoing treatment with high doses of...

Chachelly
Answered: Apr 28, 2024

5-HT3 antagonists

The correct answer is A. The most effective drugs for the treatment of chemotherapy induced nausea are the serotonin 5-HT3 antagonists. This class includes ondansetron,...Read More

2 Answers

241 views

Which is the most accurate diagnosis? A 40-year-old woman presents to her physician with complaints of blood in her urine and decreased urine output for the past week. She had a sore throat 3 weeks...

Chachelly
Answered: Apr 28, 2024

Rapidly progressive glomerulonephritis

The correct answer is F. The image shows a crescent of epithelial cells and fibrin as well as a hypercellular glomerulus, which together are...Read More

1 Answer

238 views

What would most likely occur in thrombocytopenia?

John Smith
Answered: Apr 28, 2024

Failure of conversion of fibrinogen to fibrin -platelets (thrombocytes) are involved in the conversion of fibrinogen to fibrin through the action of phospholipids. in thrombocytopenia, fibrinogen...Read More

1 Answer

234 views

Which is the most likely anatomical location for this condition? A 78-year-old man has a 3-day history of diarrhea, left lower quadrant abdominal pain, and fever. His leukocyte count is slightly...

Chachelly
Answered: Apr 28, 2024

Sigmoid colon

The correct answer is D. Diverticulitis is inflammation of diverticula, often in the sigmoid colon. It is related to retention of material within a diverticulum and fecalith...Read More

1 Answer

233 views

Which is the most likely injury in the following patient of the patient’s presentation? A 27-year-old woman is brought to the emergency department with an intense headache, left-sided weakness,...

Chachelly
Answered: Apr 28, 2024

Middle meningeal artery

The correct answer is B. Such a presentation is consistent with a significant mechanism of injury such as ejection from a vehicle at a high rate of speed. The...Read More

1 Answer

233 views

Where is this patient’s lesion most likely located? A 65-year-old obese man with a 60-pack-year smoking history presents with partial loss of vision after suffering a stroke. Physical examination...

Chachelly
Answered: Apr 28, 2024

Loop of Meyer in the right temporal lobe

The correct answer is E. The loop of Meyer is located in the temporal lobe. It carries fibers from the inferior retina that are responsible for the...Read More

1 Answer

232 views

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