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Clinical Chemistry > Electrolytes Cations > Flashcards

Electrolytes Cations Flashcards

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0
Q

Functions of sodium

A

Neuromuscularvactivity and water regulation of the body

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1
Q

90% of all extracellular cation. It is the major cation

A

Sodium

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2
Q

Cation that is 2-3% in ECF

A

Potassium

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3
Q

Cation that is vitaminD dependent to be absorb by upper small intestine. 99% in bone and 1% in blood

A

Calcium

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4
Q

50% of total calcium

A

Ionized calcium

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5
Q

40% of total calcium

A

Protein bound calcium

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6
Q

10% carboxylated calcium

A

Complex calcium

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7
Q

Functions of potassium

A
  • Nerve impulses and muscle contraction
  • Regulates interstitial osmolality
  • Promotes enzyme cations for cellular metabolism.
  • balance of acid-base
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8
Q

Hormones that regulate calcium

A

PTH, vitaminD3, calcitonin

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9
Q

Relationship of Calcium level and PTH level

A

Directly proportional

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10
Q

Relationship of calcitonin leve and calcium level

A

Inversely proportional

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11
Q

4th most abundant cation and 2nd intracellular cation

A

Magnesium

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12
Q

Concentration of magnesium in bones

A

53%

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13
Q

Magnesium composition in muscles

A

46%

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14
Q

How many percent of magnesium is precent in serum and RBC

A

<1%

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15
Q

What do you call iron that is bound to transferrin

A

Serum iron

16
Q

Percentage of iron in stored form

A

25-30%

17
Q

Percentage of iron in active form

A

70-75%

18
Q

Measurement of serum transferrin

A

Total iron binding capacity

19
Q

If there is a decrease of iron in the body, what is the result of TIBC?

A

TIBC is increased

20
Q

Functions of iron

A

Hematopioesis and growth, hb formation and pregnancy

21
Q

Diurnal variations of iron

A

M=incresed
A=low
E=very low

22
Q

Conditions known to affect serum iron

A
  • diurnal variation
  • menstrual cycle
  • iron ingestion and oral contraceptives
23
Q

Primarily excreted by kidneys

A

Sodium

24
Q

20% excreted in feces, 80-90% excreted in urine

A

Potassium

25
Q

Excreted in urine and bile (200mg/dl)

A

Calcium

26
Q

40% excreted in kidneys, 60% excreted in feces

A

Magnesium

Clinical Chemistry (2 decks)

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