NEET UG BIOLOGY MCQ: BODY FLUIDS AND CIRCULATION

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Read the following statement and choose the correct one w.r.t to Erythrocyte

(i) A healthy adult man has on an average 5 million to 5.5 million of

{RBC} \,{mm}^{-3}

of blood

(ii) RBC are devoid of nucleus in most of the mammals and are biconvex in shape

(iii) RBCs have an average life span of 120 days

(iv) RBC are formed in lungs

View answer and explanation

Correct option: A

Only (i), (iii)

Option A (Only (i), (iii)) is correct because a healthy adult man has 5-5.5 million RBCs per mm3 of blood, RBCs have an average lifespan of 120 days, but RBCs are enucleated in mammals, and they are formed in the red bone marrow, not the lungs.

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