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Tutor profile: Lincoln S.

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Lincoln S.
Resident Physician in Ophthalmology
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Questions

Subject: Health and Medicine

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Question:

A 52 year-old male presents to the emergency room with a 4 day history of bilateral eye redness, itching, irritation, and tearing. He has had no prior episodes. Initially, his symptoms started unilaterally in his right eye, but within 24 hours of his initial symptom onset his other eye became affected. He denies blurred vision, headaches, and trauma to his head or eyes. He recently has recovered from a upper respiratory tract infection (URI) of unknown etiology, and during that time his symptoms were runny nose, myalgias, and low-grade fever. What is the most likely diagnosis in this patient? (A) Retinal detachment, (B) Glaucoma, (C) Viral Conjunctivitis, (D) Central Retinal Artery Occlusion

Inactive
Lincoln S.
Answer:

The answer is (C) viral conjunctivitis. The recent URI, coupled with his current symptoms make this the most likely answer. Retinal detachment and central retinal artery occlusion would not cause these symptoms, and would very likely include blurred vision or visual loss as a symptom. Glaucoma can be acute in nature in some cases, but would likely present with blurred vision and headache as well if he was truly have an acute closed-angle glaucoma episode.

Subject: Biomedical Science

TutorMe
Question:

Oseltamivir is a drug that functions to decrease the cell-to-cell spread of the influenza virus in the respiratory tract. This drug works by selectively binding and disabling the neuraminidase enzyme, which is expressed on the viral surface of cells and reduces the release of newly-synthesized viral DNA from the host cell. By which mechanism of action does this drug function: (A) Inhibition; (B) Suppression; (C) Downregulation; (D) Cessation

Inactive
Lincoln S.
Answer:

The answer is (A) inhibition. By selectively binding and disabling the neuraminidase enzyme, oseltamivir is acting as an enzyme inhibitor.

Subject: Biology

TutorMe
Question:

Von Hippel-Lindau (VHL) syndrome is a disease that is genetically inherited. In a particular family, every generation of the family tree has experienced at least one individual with VHL disease. In generations in which either the mother or the father have VHL disease, but not both, at least some of the children have inherited the disease. It has affected males and females within the family equally. What is the most likely mode of inheritance of VHL syndrome?

Inactive
Lincoln S.
Answer:

Autosomal Dominant. If all generations of the family tree contain individuals that have genetically inherited the disease, and it does not matter if the mother or the father were responsible for passing along the gene, it is most likely to have autosomal dominant inheritance.

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