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प्रश्न
Mature RBC in mammals does not have cell organelles.
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उत्तर
The RBCs are devoid of the nucleus, mitochondria ribosome, and endoplasmic reticulum. The absence of these organelles accommodates more haemoglobin thereby maximizing the oxygen-carrying capacity of the cell. Biconcave shape increases the surface area for oxygen binding, loss of mitochondria allows the RBC to transport all the oxygen to tissues, and loss of endoplasmic reticulum allows more flexibility for RBC to move through the narrow capillaries.
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संबंधित प्रश्न
What are the components of blood?
Which is the correct sequence of blood flow?
Match the following.
| 1. Leukaemia | (a) Thrombocytes |
| 2. Platelets | (b) Phagocyte |
| 3. Monocytes | (c) Decrease in leucocytes |
| 4. Leucopenia | (d) Blood Cancer |
| 5. AB blood group | (e) Allergic condition |
| 6. O blood group | (f) Inflammation |
| 7. Eosinophil | (g) Absence of antigen |
| 8. Neutrophils | (h) Absence of antibody |
Why is the colour of the blood-red?
Who discovered the Rh factor? Why was it named so?
Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.
Assertion: RBC plays an important role in the transport of respiratory gases.
Reason: RBC does not have cell organelles and a nucleus.
Crab has blue blood.
______ are produced in the bone marrow.
The blood leaving the tissues becomes richer in
Name the only artery that carries carbon dioxide-rich blood.
