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Question

pH of blood in arteries and veins is

A
Higher in arteries and lower in veins
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B
Higher in veins and lower in arteries
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C
Same
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D
Variable in both
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Solution

The correct option is D Higher in arteries and lower in veins
pH of blood in the arteries is greater than that of the veins as the venous blood contains dissolved CO2, lactic acid and other metabolic waste that makes the venous blood more acidic.
So, the correct answer is 'Higher in arteries and lower in veins'

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