Blood is one of the important components of the body and is composed of plasma and formed elements. Formed elements are composed of Erythrocytes, leukocytes, and platelet. Erythrocytes /RBC are the most abundant cells in the blood (5-5.5millions). The cell of RBC is devoid of the nucleus and biconcave shaped. It contains hemoglobin which gives the red color to blood. Leucocytes/WBC are colorless because it lacks hemoglobin. They are nucleated, 6000-8000 mm-3 in amount and they are categories into granulocytes and agranulocytes. Neutrophils, eosinophils, and basophils are granulocytes and lymphocytes and monocytes are agranulocytes. Neutrophils and monocytes' function is to kill the foreign particles and basophils release histamines, serotonin, heparin, etc. Eosinophils resist the infection, lymphocytes (B and T cells) are responsible for immune response. Platelets/thrombocytes are responsible for blood clotting. Let's explore your knowledge about blood.
1. Name the most abundant cell in the blood?
A. Erythrocytes
B. Leucocytes
C. Platelets
D. Neutrophiles
2. The average life span of RBC is ....
A. 140 days
B. 120 days
C. 130 days
D. 125 days
3. The average life span of WBC is ...
A. 18-30 days
B. 12-20 days
C. 14-28 days
D. 16-32 days
4. What is the function of hemoglobin in blood?
A. To carry oxygen
B. To resist the infection
C. To kill the foreign particles
D. None of the above
5. Basophils are responsible for ...
A. To secrete the histamine
B. To produce allergic reaction
C. To produce immune response
D. All of the above
6. Why blood do not clot inside the body?
A. Due to the presence fibrinogen
B. Due to presence of heparin
C. Due to the presence of albumin
D. None of the above
7. Graveyard of RBC is ...
A. Bone marrow
B. Liver
C. Spleen
D. Kidney
8. Name the organ responsible for the RBC synthesis?
A. Liver
B. Kidney
C. Bone marrow
D. Spleen
9. Why RBC are devoid of the nucleus?
A. To boost the metabolism
B. To accommodate the more hemoglobin
C. Due to the presence of abundant cell organelle
D. All of the above
10. What is the function of the leucocytes?
A. To kill foreign particles
B. To resist the infection
C. Immune response
D. All of the above
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