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6 Cards in this Set
- Front
- Back
PTH
-stim by what? -actions |
*stim by low Ca++
Actions: 1. Bone: incr Ca++ & PO4 resorption 2. GI: incr Ca++ abs 3. Kidney: incr Ca++ abs; decr phosphate abs; converts 25(OH)D==>1,25(OH)2 D |
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1,25(OH)2 D
-stim by what? -actions? |
Kidney converts 25(OH)D==>1,25(OH)2 D in response to:
1. low serum Ca++ 2. low serum phosphorus Actions: 1. Bone: incr Ca++ & PO4 resorp 2. GI: incr Ca++ & PO4 abs |
|
Calcitonin
|
1. Kidney: ↑ Ca++ excretion
2. Bone: ↓ Ca++ release 3. GI: ↓ Ca++ abs |
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et of Hypercalcemia
|
1. MCC=Hyper-PTH
2. Malignancy 3. FHH=Familial Hypocalinuric Hypercalcemia) distinguish b/w them b/c FHH has very little Ca++ in urine) 4. MEN 1, 2 |
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hypocalcemia
-Sx? -et? |
Sx:
tetany hypotension bradycardia EKG changes: -prolonged QT, ST -abnl T wave Et: -hypo-PTH -PTH resistance="Pseudohypoparathyrodism" -Vit D def |
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Pseudohypoparathyroidism
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=PTH resistance
-causes hypocalcemia |