NEET · Biology —

Body Fluids and Circulation appeared 2 times across 1 year — 2.2% of Biology. This question is from Rh Grouping and Erythroblastosis Foetalis.

Year 2024 Total
Questions 2 2
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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:

Solution & Explanation

Related Formula

Erythroblastosis Foetalis: Mother (Rh-ve) + Foetus (Rh+ve) Prevention Anti-Rh antibodies after 1st delivery

Core Logic

Evaluation of statements:

  • A (Incorrect): Erythroblastosis foetalis occurs when mother is Rh-ve and foetus is Rh+ve (statement A swaps these).
  • B (Correct): Rh antigen is present in nearly 80% of human beings (Rh+ve).
  • C (Correct): Rh compatibility matching is vital before blood transfusion.
  • D (Correct): Rh incompatibility occurs between Rh-ve mother and Rh+ve foetus.
  • E (Incorrect): Anti-Rh antibodies must be administered immediately after delivery of the FIRST child (not second child) to prevent sensitization.
Step 1: Conclusion

Statements A and E are incorrect.

Pattern Recognition

Sees: "incorrect statements Rh grouping". Shortcut: A is inverted condition; E specifies 2nd child instead of 1st child.

Chapter Mix

Class 11 Biology: Body Fluids and Circulation

Reference Study Guides

Body Fluids And Circulation

More Body Fluids and Circulation Previous-Year Questions

Q155 neet_2024_05_may_morning WBC Differential Count Calculation
The WBC count of a person's blood sample is 8000 / mm³. How many eosinophils and lymphocytes would be in the same blood sample approximately?
  • A. 160 - 240 / mm³ and 1600 - 2000 / mm³ respectively
  • B. 100 - 120 / mm³ and 160 - 200 / mm³ respectively
  • C. 300 - 500 / mm³ and 500 - 700 / mm³ respectively
  • D. 300 - 500 / mm³ and 1200 - 1500 / mm³ respectively

Solution

Related Formula
Eosinophils = 2 - 3% of Total WBC Lymphocytes = 20 - 25% of Total WBC
Core Logic

Given Total WBC count = 8000 / mm³.

  • Eosinophils (2–3%):
Count = (2)/(100) × 8000 to (3)/(100) × 8000 = 160 - 240 / mm³
  • Lymphocytes (20–25%):
Count = (20)/(100) × 8000 to (25)/(100) × 8000 = 1600 - 2000 / mm³
Step 1: Conclusion

Eosinophils = 160 - 240 / mm³ and Lymphocytes = 1600 - 2000 / mm³.

Pattern Recognition

Sees: "8000 WBC count eosinophils lymphocytes calculation". Shortcut: 2–3% of 8000 = 160–240; 20–25% of 8000 = 1600–2000.

Chapter Mix

Class 11 Biology: Body Fluids and Circulation

More Body Fluids and Circulation Questions — neet_2024_05_may_morning

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