Calcium/Phosphorus/Vitamin D (mason) Flashcards

1
Q

Normal Total Serum Calcium

A

8.4-10.2mg/dL

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2
Q

Normal Ionized Serum Calcium

A

4.3-5.3mg/dL

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3
Q

Vitamin D: Bone Resorption

A

Increase Ca++, PO4

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4
Q

Vitamin D: Renal Absorption

A

Increase Ca++, PO4

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5
Q

Vitamin D: Small Intestine Absorption

A

Increase Ca++, PO4

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6
Q

NET Effect: Vitamin D

A

Increase Ca++, PO4

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7
Q

PTH: Bone Resorption

A

Increase Ca++, PO4

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8
Q

PTH: Renal Absorption

A

Increase Ca++, DECREASE PO4 (MAJOR)

*PTH induces kidneys to increase phosphorous elimination

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9
Q

PTH: Small Intestine Absorption

A

Increase Ca++, PO4

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10
Q

NET Effect: PTH

A

Increase Ca++, Decrease PO4

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11
Q

Calcitonin: Bone Resorption

A

Decrease Ca++, PO4

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12
Q

Calcitonin: Renal Absorption

A

Decrease Ca++, PO4

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13
Q

Calcitonin: Small Intestine Absorption

A

Decrease Ca++, PO4

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14
Q

NET: Calcitonin

A

Decrease Ca++, PO4

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15
Q

Liver Vitamin D Metabolism

A

Dietary Vitamin D –> Calcidiol (25-OH D)

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16
Q

Kidney Vitamin D Metabolism

A

Calcidiol (25-OH D) –> Calcitriol (1,25-OH D)

17
Q

Calcitriol: Actions (2)

A

Increase bone resorption
Increase absorption of dietary calcium/phosphorous
Reduce renal elimination of PO4 + Ca++

18
Q

Corrected Calcium: Low albumin (

A

c[Ca] = [Ca]serum + [0.8 * (4.0 - [meas. albumin])

19
Q

Corrected Calcium: pH

A

c[Ca] = [Ca]serum + [0.12/0.1 * (7.4 - observed pH)]