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प्रश्न
Direction: In each of the following questions a statement of assertion (A) is given and a corresponding statement of Reason (R) is given just below it. Mark the correct statement as.
Assertion: RBC plays an important role in the transport of respiratory gases.
Reason: RBC does not have cell organelles and a nucleus.
विकल्प
If both A and R are true and R is the correct explanation of A.
If both A and R are true but R is not the correct explanation of A.
A is true but R is false.
Both A and R are false.
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उत्तर
If both A and R are true and R is the correct explanation of A.
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संबंधित प्रश्न
What are the components of blood?
| The liquid connective tissue A circulates in our body continuously without stopping. This tissue contains a pigment B which imparts it a colour C. The tissue A consists of four components D, E, F and G. The component D fights infection and protects us from diseases. The component E helps in the clotting of tissue A if a person gets a cut. The component F is a liquid which consists mainly of water with many substances dissolved in it and component G carries oxygen from the lungs to all the parts of the body. |
- What is (i) tissue A (ii) pigment B, and (iii) colour C?
- Name (i) D (ii) E (iii) F, and (iv) G.
- Name one substance (other than oxygen) which is transported by tissue A in the human body.
- Which two components of tissue A are the cells without nucleus?
- Name any two organisms ( animals) which do not have liquid like A in their body.
Name the following:
Components of blood
State the Function: Vitamin K
Match the following.
| 1. Leukaemia | (a) Thrombocytes |
| 2. Platelets | (b) Phagocyte |
| 3. Monocytes | (c) Decrease in leucocytes |
| 4. Leucopenia | (d) Blood Cancer |
| 5. AB blood group | (e) Allergic condition |
| 6. O blood group | (f) Inflammation |
| 7. Eosinophil | (g) Absence of antigen |
| 8. Neutrophils | (h) Absence of antibody |
All veins carry deoxygenated blood.
Blood is a fluid connective tissue.
What prevents the backflow of blood inside the heart during contraction?
Single circulation i.e. blood flows through the heart only once during one cycle of passage through the body, is exhibited by
While learning to ride a bicycle Boojho lost his balance and fell. He got bruises on his knees and it started bleeding. However, the bleeding stopped after some time.
- Why did the bleeding stop?
- What would be the colour of the wounded area and why?
- Which type of blood cells are responsible for clotting of blood?
