NEET · Biology —

Body Fluids and Circulation appeared 2 times across 1 year — 2.2% of Biology. This question is from Formed Elements of Blood.

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

Solution & Explanation

Core Logic

Eosinophils constitute 2 - 3% of total WBCs. Hence its value is approximately 2% to 3% of 8000/cu mm:

0.02 × 8000 = 160 0.03 × 8000 = 240

So, eosinophils range from 160 - 240 /cu mm.

Lymphocytes constitute 20 - 25% of total WBCs. Hence its value is approximately 20% to 25% of 8000/cu mm:

0.20 × 8000 = 1600 0.25 × 8000 = 2000

So, lymphocytes range from 1600 - 2000 /cu mm.

Pattern Recognition

Memorize the standard percentages: Neutrophils (60-65%), Lymphocytes (20-25%), Monocytes (6-8%), Eosinophils (2-3%), Basophils (0.5-1%). Apply directly to total count.

Chapter Mix

Class 11 Biology: Body Fluids and Circulation

Reference Study Guides

Body Fluids And Circulation

More Body Fluids and Circulation Previous-Year Questions

Q167 neet_2026_03_may_morning Rh Grouping
Select the incorrect statement with reference to Rh grouping. A. Erythroblastosis foetalis is a condition observed having foetus with Rh-ve blood and mother with Rh+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 Rh-ve and the foetus is Rh+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. A and E only
  • B. A and B only
  • C. B and C only
  • D. C and D only

Solution

Core Logic

(A) Incorrect - A special case of Rh incompatibility has been observed between the Rh-ve blood of a pregnant mother and Rh+ve blood of the foetus (not the reverse). (B) Correct - Rh antigen is observed on the surface of RBCs of the majority (nearly 80 percent) of humans. (C) Correct - Before blood transfusion, Rh group should also be matched to avoid severe problems of destruction of RBCs. (D) Correct - Rh incompatibility (Erythroblastosis foetalis) is observed when a pregnant mother is Rh-ve and the foetus is Rh+ve. (E) Incorrect - Erythroblastosis foetalis can be avoided by administering anti-Rh antibodies to the mother immediately after the delivery of the FIRST child, not the second.

Step 1: Final Conclusion

Thus, the incorrect statements are (A) and (E).

Pattern Recognition

Erythroblastosis foetalis strictly requires Mother = Rh(-), Foetus = Rh(+). Prevention must occur after the FIRST exposure (first child).

Chapter Mix

Class 11 Biology: Body Fluids and Circulation

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