Which of the following cell/cells are not Granulocytes?
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Explanation
NCERT, P-279, Formed Elements, last Para
Body Fluids and Circulation MCQs for NEET — Zoology Questions with Answers
Practice free Body Fluids and Circulation (Zoology) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
If a person is AB – , who cannot donate blood to this person?
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Explanation
AB negative means, the person does not carry Rh antigen and is free to make antibody against Rh antigen carrying blood groups.
A person with blood group O– can take blood from
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Explanation
O negative means, the person does not carry any antigen, so will make all three types of antibodies, so, only another O negative person can give blood.
Fibrins are formed by conversion of _______ in _______ by the enzyme _______
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Explanation
NCERT, P-281 Coagulation of Blood
Which of the following blood groups is considered the 'universal recipient' due to the absence of antibodies A and B in its plasma?
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Explanation
According to Table 15.1 and the accompanying text, 'Persons with 'AB' group can accept blood from persons with AB as well as the other groups of blood. Therefore, such persons are called 'universal recipients'.' This is because their plasma contains no anti-A or anti-B antibodies, allowing them to receive blood from all ABO groups without agglutination.
Erythroblastosis foetalis is a condition that can occur due to incompatibility between the blood of a mother and her foetus. Which of the following accurately describes the blood types involved?
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Explanation
The context states: 'A special case of Rh incompatibility (mismatching) has been observed between the Rh-ve blood of a pregnant mother with Rh+ve blood of the foetus.' This condition results when the mother's immune system, exposed to the Rh antigen from the foetus, produces antibodies that can then attack a subsequent Rh+ve foetus.
During a first pregnancy, why does Rh incompatibility typically not cause erythroblastosis foetalis?
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Explanation
The NCERT text explains: 'Rh antigens of the foetus do not get exposed to the Rh-ve blood of the mother in the first pregnancy as the two bloods are well separated by the placenta.' This prevents the mother from forming antibodies during the first pregnancy.
A person with blood group O lacks which antigens on the surface of their RBCs?
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Explanation
Table 15.1 shows that for blood group O, the 'Antigens on RBCs' column lists 'nil', meaning both A and B antigens are absent. This is why group O individuals are 'universal donors'.
An Rh-ve person is exposed to Rh+ve blood. What is the immediate consequence in terms of immune response?
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Explanation
The text states: 'An Rh-ve person, if exposed to Rh+ve blood, will form specific antibodies against the Rh antigens.' This indicates a delayed immune response where antibodies are produced upon initial exposure, rather than an immediate reaction.
Why is it crucial to match blood types carefully before performing a blood transfusion?
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Explanation
The context explicitly states: 'You probably know that during blood transfusion, any blood cannot be used; the blood of a donor has to be carefully matched with the blood of a recipient before any blood transfusion to avoid severe problems of clumping (destruction of RBC).'
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