2/21 UWORLD test # 20 Flashcards
Q 1. There are 5 gastric layers. In which layer does parietal cells locate? What about chief cell?
- epithelium
- glands
- deeper glands
- muscularis mucosa
- submucosa
- parietal cell
- chief cell
Q 2. What age population does polymyalgia rheumatica happen? What are symptoms? labs?
vs. fibromyalgia
- polymyalgia rheumatica
- fibromyalgia
Q 3. Describe cross over study. washout period?
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Q 4. Cavernous hemangioma: what are two subtypes? What is increased risk?
(Hint: FA 368)
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Q 5. What hormones use cAMP as a second messenger system? what about IP3?
(FA 316)
- cAMP
- IP3
Q 5. Growth hormone receptor uses what signaling pathway?
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Q 5. Insulin binds to what receptor type? it uses what signaling pathway?
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Q 6. Pathophysiology of Henoch-Schonlein purpura? treatment?
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Q 7. Describe how mucosal immunity is developed
- Which cell serves as antigen presenting cell
- Antigen is presented to what cell, where is this cell located?
- Which antibody is primarily produced? where does it travel to?
M cell- Macrophage: works as APC. It picks up antigen and present to B cells
B cell- meet antigen and undergoes activation at germinal center of peyer’s patch. Activated B cell becomes IgA secreting plasma cell.
IgA secreting plasma cell secretes IgA into gut lumen, where it serves to protect mucosa
IgA is PRIMARILY involved in mucosal immunity. This is the main humoral response after vaccine. (While live-attenuated vaccine responds more significantly than killed vaccine)
Q 7. Explain why selective IgA deficiency is usually asymptomatic
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Q 8. List two reactions that utilize B12 as a cofactor. Deficiency of B12 can result in accumulation of what metabolites?
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Q 8. Phenotypes of B12 deficiency (2)?
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Q 8. B9 vs. B12
- Both can cause what?
- Deficiency of which is more common? why?
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Q 9. Impaired tubular bicarbonate reabsorption may lead to what type of acidosis?
(Hint: think mnemonics)
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Q 9. Describe how Von Gierke disease can cause lactic acidosis
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Q 9. How aspiration pneumonia causes lactic acidosis? What type of acidosis is it?
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Q 10. List two most susceptible locations (depending on supine vs. upright) of aspiration pneumonia
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Q 10. What bacteria are dominant organisms that grown on aspiration pneumonia?
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Q 11. Describe how obstructive sleep apnea causes pulmonary hypertension? What about systemic hypertension?
- pulmonary HTN
- systemic HTN