Random USMLE Facts volume 7-6

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Random USMLE Facts volume 7-6:

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

Why does amenorrhea occur in anorexia nervosa?

Amenorrhea results from loss of pulsatile GnRH release from the hypothalamus.

NOTE: Auer rods stain positive for myeloperoxidase.

What biochemical activity is noted in Alzheimer's disease?

Decrease in Ach level (most notably in the basal nucleus of Meynert) due to decreased choline acetyltransferase activity in nucleus basalis.

What happens to blood pressure when only alpha-1 receptors are stimulated?

Diastolic blood pressure is increased.

What are the findings and causes of gingivostomatitis?

Findings include swollen gums with ulcerative lesions, enlarged cervical lymph nodes, fever, loss of appetite, and irritability. The cause is HSV-1 (enveloped double-stranded DNA virus).

What are the toxic effects of anticholinergic medications?

Blockade of muscarinic receptors, which cause facial flushing and dilated pupils.

What is the mechanism of action of cocaine?

Prevents norepinephrine reuptake.

Cardiac drugs

• Atrial fibrillation - Digoxin, beta blockers, class III as last resort.
• Atrial and ventricular Arrhythmias - Quinidine/Procainamide/Disopyramide; class III as last resort.
• Supraventricular tachycardia - Class IC, IV, Adenosine.
• Ventricular arrhythmia - Lidocaine/Mexiletine/Tocainide, beta-blockers; class III as last resort.

Epithelial junctions

• Tight junction / zona occludens: glands; only columnar cells.
• Gap junction: heart, bones.
• Hemidesmosomes: basal lamina.
• Intermediate filaments / zona adherens: cells stick together (reinforcement).
• Desmosomes / macula adherens: bind cells together (main).

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

Medical Images

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

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