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प्रश्न
Why is a person having blood group AB called universal recipient and a person with blood group O called a universal donor?
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उत्तर
People with blood group O are called universal donors because they can donate blood to all the blood groups. Their red blood cells (RBCs) have no antigens and so cannot be stuck by blood of any other group. People with blood group AB are called universal recipients because they can receive blood from all 4 blood groups. The red cells in them have no antibodies and therefore it does not stick with blood from other groups.
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संबंधित प्रश्न
The diagram given below represents a section of the human heart. Answer the questions that follow :
(i) Which parts of heart are in the diastolic phase? Give a reason to support your answer.
(ii) Label the parts numbered 1 and 2 in the diagram. What type of blood flows through them?
(iii) What causes the heart sounds ‘LUBB’ and ‘DUP’?
(iv) Name the blood vessels that supply oxygenated blood to the heart muscles.
(v) Draw neat labelled diagrams of a cross section of an artery and a vein.
State the functions of blood in our body.
Why is it necessary to know the blood groups before giving transfusion?
Name the following:
The fluid found between the membranes of the heart.
Give reason for the following:
The walls of the left ventricle are thicker than the walls of all other chambers.
pH of oxygenated blood is ______.
Put a tick mark (✓) against the correct alternative in the following statement.
The blood tastes saltish due to the dissolved.
Multiple choice questions. Tick ( ✓ ) the correct choice:
The blood vessels in which blood goes away from the heart to different body parts are
True or false:
Blood group A has antigen A.
Name these:
Three circulating fluids in human body.
