Random USMLE Facts volume 8-6

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Random USMLE Facts volume 8-6:

USMLE Facts 1 USMLE Facts 2 USMLE Facts 3 USMLE Facts 4 USMLE Facts 5
USMLE Facts 6 USMLE Facts 7 USMLE Facts 8 USMLE Facts 9 USMLE Facts 10

What is the function of hyaluronic acid?

Water retention in the extra-cellular matrix.

Which antiarrhythmic is specific for rapidly depolarizing or depolarized tissue?

Lidocaine is specific for rapidly depolarizing or depolarized tissue (like ischemic tissue).

What is the usage of:

• Procainamide: antiarrhythmic.
• Verapamil: atrial tachyarrhythmias.
• Adenosine: paroxysmal supraventricular tachycardia.
• Digoxin: atrial fibrillation.
• Labetalol: refractory hypertension, hypertensive urgency, and pheochromocytoma.
• Amlodipine: hypertension and angina.

What are the causes and findings of superior sulcus tumor?

Hemoptysis in an elderly smoker. Other findings include shoulder pain, Horner's syndrome, upper limb edema, and paraplegia. These findings are collective called pancoast syndrome and are caused by a tumor at the lung apex; pain is distributed to C8, T1, and T2 nerve roots.

What is the purpose of meningococcal pilus?

Pharyngeal colonization; we're talking about Neisseria meningitidis.

Bisphosphonates are drugs that are structurally similar to?

Pyrophosphate.

Occlusion of what artery may cause Broca's aphasia?

Left middle cerebral artery; findings include inability to speak. It should be noted that the left hemisphere is more dominant in both left- and right-handed individuals.

What is the mechanism of action of perchlorate and pertechnetate?

Blockage of iodine absorption by the thyroid gland via competitive inhibition.

How do infectious agents develop resistance to penicillins?

Mutated penicillin binding proteins.

What is the order of enzymes used in base pair excision repair?

From first to last: glycosylase, endonuclease, lyase, DNA polymerase, and ligase.

What are some findings in VIPoma?

Diarrhea, achlorhydria, metabolic acidosis, and hypokalemia.

An individual with Barrett's esophagus is at the risk of developing?

Adenocarcinoma.

What is the connection between thyroid hormone and growth hormone?

Thyroid hormones stimulate growth hormone secretion by the anterior pituitary. An animal deficient in thyroid hormones will also be deficient in growth hormone.

What is the usability and mechanism of action of aprepitant?

Used to treat nausea; NK1 antagonist.

What are the findings and causes of homonymous hemianopsia?

One cause may be posterior cerebral artery stroke; findings include bumping into things on the right or left side. The PCA supplies the occipital lobe.

USMLE Facts 1 USMLE Facts 2 USMLE Facts 3 USMLE Facts 4 USMLE Facts 5
USMLE Facts 6 USMLE Facts 7 USMLE Facts 8 USMLE Facts 9 USMLE Facts 10

Additional Readings:

Random USMLE Facts

1. Random USMLE Facts volume 1-1
2. Random USMLE Facts volume 2-1
3. Random USMLE Facts volume 3-1
4. Random USMLE Facts volume 4-1
5. Random USMLE Facts volume 5-1
6. Random USMLE Facts volume 6-1
7. Random USMLE Facts volume 7-1
8. Random USMLE Facts volume 8-1
9. Random USMLE Facts volume 9-1
10. Random USMLE Facts volume 10-1
11. Random USMLE Facts volume 11-1
12. Random USMLE Facts volume 12-1

General and Systemic Examinations

1. General Examination for Internal Medicine
2. Jugular Venous Distention Workup
3. ER Chest Pain Workup
4. Format for Patient Presentation
5. Pulmonary Examination for Internal Medicine
6. Cardiac Examination for Internal Medicine
7. Abdominal Examination for Internal Medicine
8. Cranial Nerve Reflexes
9. Motor System Examination
10. Random Sensory System Facts
11. Random Stroke Facts

Medical Files & Presentations

1. USMLE Flashcards [Size: 1.9 MB; Format: MS Powerpoint]
2. Otitis Media in Children [Size: 5.4 MB; Format: MS Powerpoint]
3. Irritable Bowel Syndrome [Size: 170 kB; Format: MS Powerpoint]
4. Acid-Base Disturbance: Acidotic or Alkalotic? [Size: 427 kB; Format: PDF]
5. Thrombocytopenia [Size: 2.42 MB; Format: MS Powerpoint]
6. Are Face Transplants Ethical? [Size: 70.2 kB; Format: MS Powerpoint]

USMLE Step 2 CS Videos

1. Video of Cardiology Examination in a Clinical Setting
2. Video of Neurology Examination in a Clinical Setting
3. Video of Pulmonology Examination in a Clinical Setting
4. Video of Musculoskeletal Examination in a Clinical Setting
5. Video of Abdominal Examination in a Clinical Setting
6. Video of HEENT Examination in a Clinical Setting
7. Video and Description of Rinne Hearing Test
8. Video and Description of Weber Hearing Test

USMLE Laboratory (lab) Values

1. USMLE Blood Lab Values
2. USMLE Cerebrospinal Lab Values
3. USMLE Hematologic Lab Values
4. USMLE Sweat and Urine Lab Values

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Useful Medical Images & Diagrams (link opens in a new window)

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