The ion present in highest concentration inside most cells is
The ion present in highest concentration inside most cells is
a.Sodium
b. Potassium
c. Calcium
d. Chloride
e. Phosphate
Answer
b. Potassium
Discussion
Ionic Composition of Body Fluids
Electrolytes
Intracellular Fluids
Extracellular Fluids
Plasma (mOsm/L H2O)
Interstitial (mOsm/L H2O)
Sodium (Na+)
142
139
14
Potassium (K+)
4.2
4.0
140
Calcium (Ca+2)
1.3
1.2
0
Magnesium (Mg+2 )
0.8
0.7
20
Chloride (Cl– )
108
108
4
B
icarbonate (HCO3-)
24
28.3
10
Phosphate (HPO4–, H2PO4–)
2
2
11
Sulphate (SO4–3)
0.5
0.5
1
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