Zoology-Drug Abuse
NEET Zoology Drug Abuse MCQ Question
Type: MCQ-numerical-Hard-Class 12
If the concentration of carbon monoxide (CO) in a smoker's blood increases such that it reduces the haembound oxygen by 20%, what will be the expected effect on the oxygen delivery to the tissues, considering the normal haembound oxygen is 98% of total blood oxygen? Assume no other factors affect oxygen delivery.
A
Oxygen delivery decreases by 19.6%
B
Oxygen delivery increases by 20%
C
Oxygen delivery remains unchanged
D
Oxygen delivery decreases by 20%
Correct Answer
Option A
Detailed Explanation
The NCERT context explains that smoking increases CO content in blood, which reduces haembound oxygen. A 20% reduction in haembound oxygen (normally 98%) results in a 19.6% decrease in oxygen delivery to tissues.
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