Principle Of Inheritance And Variation Question 45
When whole blood is stored with an anticoagulant at $ 4{}^\circ C $ , the $ {K^{+}} $ ions move out from the RBC into the plasma. The most likely reasons for this are that [AIIMS 1982; DPMT 1992]
Options:
A) RBC haemolysis and hence leakage of $ {K^{+}} $ ions
B) ${K^{+}}$ ions become less mobile at $ 4{}^\circ C $
C) Active transport ceases resulting in ionic equilibrium
D) The anticoagulant attracts the $ {Ca^{2+}} $ ions into the plasma
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Answer:
Correct Answer: B
Solution:
Blood is stored with an anticoagulant at 4°C.
At normal temperature due to potassium pump, K+ ions are more inside RBC than plasma.
Low temperature inhibits the potassium pump; i.e., active transport, K+ ions exit from RBCs resulting in ionic equilibrium.
BETA
