Blood plasma has the following composition (milliequivalents per litre). Calculate its osmotic pressure at 37°C Na+=138, Ca2+=5.2, K+=4.5, Mg2+=2.0, Cl-=105, HCO-3=25, PO3-4=2.2, SO2-4=0.5, Proteins = 16, Others = 1.0

Question

Blood plasma has the following composition (milliequivalents per litre). Calculate its osmotic pressure at 37°C Na+=138, Ca2+=5.2, K+=4.5, Mg2+=2.0, Cl-=105, HCO-3=25, PO3-4=2.2, SO2-4=0.5, Proteins = 16, Others = 1.0 (A) 7.47 atm (B) 7.30 atm (C) 7.29 atm (D) 7.40 atm

Tardigrade Admin · Accepted Answer

Since for calculating osmotic pressure we require millimoles/litre therefore

N a^{+} = 138

,

C a^{2 +} = \frac{5.2}{2}

= 2.6, K^{+} = 4.5

,

M g^{2 +} = \frac{2.0}{2}

= 1.0

,

C l^{-} = 105

,

H C O_{3}^{-} = 25

,

P O_{4}^{3 -} = \frac{2.2}{3} = 0.73

,

S O_{4}^{2 -} = \frac{0.5}{2} = 0.25

, Proteins = 16,
others = 1.0
Total = 294.18 millimoles/litre

= \frac{294.18}{1000} = 0.294

moles/litre
Now since

π = CST

= 0.294 \times 0.0821 \times .310 = 7.47

atm

Q. Blood plasma has the following composition (milliequivalents per litre). Calculate its osmotic pressure at $3 7^{\circ} C$
$N a^{+} = 138, C a^{2 +} = 5.2, K^{+} = 4.5, M g^{2 +} = 2.0, C l^{-} = 105, H C O_{3}^{-} = 25, P O_{4}^{3 -} = 2.2, S O_{4}^{2 -} = 0.5$ , Proteins = 16, Others = 1.0

$7.47 a t m$

$7.30 a t m$

$7.29 a t m$

$7.40 a t m$

Q. Blood plasma has the following composition (milliequivalents per litre). Calculate its osmotic pressure at 37∘C Na+=138,Ca2+=5.2,K+=4.5,Mg2+=2.0,Cl−=105,HCO3−​=25,PO43−​=2.2,SO42−​=0.5, Proteins = 16, Others = 1.0

7.47atm

7.30atm

7.29atm

7.40atm

Q. Blood plasma has the following composition (milliequivalents per litre). Calculate its osmotic pressure at $3 7^{\circ} C$
$N a^{+} = 138, C a^{2 +} = 5.2, K^{+} = 4.5, M g^{2 +} = 2.0, C l^{-} = 105, H C O_{3}^{-} = 25, P O_{4}^{3 -} = 2.2, S O_{4}^{2 -} = 0.5$ , Proteins = 16, Others = 1.0

$7.47 a t m$

$7.30 a t m$

$7.29 a t m$

$7.40 a t m$