HUMAN PHYSIOLOGY
BODY FLUIDS AND CIRCULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Both assertion and reason are true and reason is correct explanation of assertion.
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Both assertion and reason are true but reason is not correct explanation of assertion.
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Assertion is true but reason is false.
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Assertion is false but reason is true.
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Detailed explanation-1: -Losing the nucleus enables the red blood cell to contain more oxygen-carrying hemoglobin, thus enabling more oxygen to be transported in the blood and boosting our metabolism.
Detailed explanation-2: -Mammalian RBCs are devoid of organelles like nucleus, mitochondria and endoplasmic reticulum. They are biconcave in shape. This is done so that maximum haemoglobin can be transported by RBCs. So, haemoglobin cannot accumulate in these organelles inside an RBC.
Detailed explanation-3: -Mammal red blood cells (erythrocytes) contain neither nucleus nor mitochondria. Traditional theory suggests that the presence of a nucleus would prevent big nucleated erythrocytes to squeeze through these small capillaries. However, nucleus is too small to hinder erythrocyte deformation.
Detailed explanation-4: -The advantage of nucleated red blood cells is that these cells can undergo mitosis. Anucleated red blood cells metabolize anaerobically (without oxygen), making use of a primitive metabolic pathway to produce ATP and increase the efficiency of oxygen transport.