What blood is made of — practice questions

Question 1 · difficulty L1 · recall

The formed element chiefly responsible for oxygen transport:

• A. monocyte
• B. platelet
• C. neutrophil
• D. erythrocyte

Question 2 · difficulty L1 · recall

The formed element primarily involved in blood clotting:

• A. eosinophil
• B. lymphocyte
• C. platelet
• D. erythrocyte

Question 3 · difficulty L1 · recall

The liquid matrix of blood:

• A. platelet
• B. fibrin
• C. lymphocyte
• D. plasma

Question 4 · difficulty L1 · recall

Which component normally forms the largest fraction of human blood by volume?

• A. Plasma
• B. Erythrocytes
• C. Leucocytes
• D. Platelets

Question 5 · difficulty L2 · understanding

Which plasma protein contributes most directly to maintaining the osmotic balance of blood?

• A. Fibrinogen
• B. Albumin
• C. Haemoglobin
• D. Thrombin

Question 6 · difficulty L2 · understanding

Why are mature human erythrocytes especially efficient at transporting oxygen?

• A. They are the only blood cells able to leave capillaries
• B. They contain mitochondria that continuously produce oxygen
• C. Their biconcave enucleate form allows abundant haemoglobin
• D. They synthesize antibodies while circulating

Question 7 · difficulty L3 · application

A blood smear shows a leucocyte with a multilobed nucleus that actively engulfs bacteria. Which cell type is the best match?

• A. Lymphocyte
• B. Eosinophil
• C. Basophil
• D. Neutrophil

Question 8 · difficulty L3 · application

A patient sample shows a marked rise in a granulocyte commonly associated with allergic reactions and defence against parasites. Which cell is most likely increased?

• A. Eosinophil
• B. Neutrophil
• C. Monocyte
• D. Erythrocyte

Question 9 · difficulty L3 · understanding

The WBC count of a person's blood sample is $8000 / \mathrm{cu} \mathrm{mm}$. How many eosinophils and lymphocytes would be in the same blood sample approximately?

• A. $300-500 / \mathrm{cu} \mathrm{mm}$ and $1200-1500 / \mathrm{cu} \mathrm{mm}$ respectively
• B. $160-240 / \mathrm{cu} \mathrm{mm}$ and $1600-2000 / \mathrm{cu} \mathrm{mm}$ respectively
• C. $300-500 / \mathrm{cu} \mathrm{mm}$ and $500-700 / \mathrm{cu} \mathrm{mm}$ respectively
• D. $100-120 / \mathrm{cu} \mathrm{mm}$ and $160-200 / \mathrm{cu} \mathrm{mm}$ respectively

Question 10 · difficulty L3 · understanding

Select the incorrect statement with reference to Rh grouping. A. Erythroblastosis foetalis is a condition observed having foetus with $\mathrm{Rh}^{-\mathrm{ve}}$ blood and mother with $\mathrm{Rh}^{+\mathrm{ve}}$ blood. B. Rh antigen is observed on RBCs in the majority of human beings. C. Before blood transfusion, Rh group should also be matched. D. Rh incompatibility is observed when a pregnant mother is $\mathrm{Rh}^{-\mathrm{ve}}$ and the foetus is $\mathrm{Rh}^{+\mathrm{ve}}$. E. Erythroblastosis foetalis can be avoided by administering anti-Rh antibodies to the mother immediately after the delivery of the second child. Choose the answer from the options given below :

• A. C and D only
• B. A and B only
• C. A and E only
• D. B and C only