[9] Calcium, Magnesium, and Phosphorous Balance Flashcards Preview

[OS 206] 3rd Lecture Exam > [9] Calcium, Magnesium, and Phosphorous Balance > Flashcards

Flashcards in [9] Calcium, Magnesium, and Phosphorous Balance Deck (16)
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1
Q

Calcium % in Soft Tissue

A

0.6%

2
Q

Calcium % in Bone and Teeth

A

99.3% as Hydroxyapatite

3
Q

Calcium % in ECF

A

0.1%

4
Q

What does Calcium bind with in the cell?

A

Clabindin D-28K

Remember: Calcium cannot exist as a free form in the cell

5
Q

How is Calcium removed from the cell?

A

Ca2+ ATPase Pump

6
Q

How does Vitamin D help in calcium Absorption

A

Synthesis of Calbindin D-28K

7
Q

Protein-Bound Calcium

A

90% Bound to Albumin

10% Globulin

8
Q

How do you correct total calcium levels

A

Add 0.8mg/dL for every 1g/dL if albumin is <4g/dL

9
Q

Formula for Serum Calcium

A

Adjusted Total Calcium = Total Calcium + (0.8 * (4- Albumin))

10
Q

Effect of Blood pH on Free Serum Calcium

Acidemia
Alkalemia

A

Acid: + Ionized Ca2+
Alkal: - Ionized Ca2+

11
Q

Low Serum Calcium immediate activates?

A

PTH

12
Q

Function: Phosphorous

A

Skeletal Development
Mineral Metabolism
Energy Transfer through Mitochondrial Metabolism
Cell Membrane Phospholipid Content and Function
Cell Signalling
Platelet Aggregation

13
Q

Relationship of Calcium and Phosphorous

A

Inverse, like a see-saw

14
Q

What does Vitamin D do for Phosphorous?

A

Promotes Reabsorption

15
Q

Where is Phosphorous Absorbed?

A

70% PCT

15% Straight segment of the promixal tubule

16
Q

Does Magnesium absorption depend on hormones?

A

No, it is not affected