278425
Assertion: In lymphatic system, lymph is known as tissue fluid.
Reason: It comprises of plasma proteins, RBCs and WBCs.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) Lymphatic system comprises of lymph, lymphatic capillaries, lymphatic vessels, lymphatic nodes and lymphatic ducts. Lymph is a transparent fluid derived from blood and other tissues, that accumulates in the interstitial spaces as the interstitial fluid. It also contains leucocytes, mainly the lymphocytes. This fluid has a composition similar to that of plasma, except that it is low in proteins.
NCERT Page-282 / N-197
Body fluids and circulation
278426
Assertion: Type ' $O$ ' blood group individuals are called 'universal donors'.
Reason: RBCs of ' $O$ ' blood group consists both ' $A$ ' and 'B' surface antigens.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) If a blood transfusion is made between an incompatible donor and recipient, reaction of antigens on the cells and antibodies in the plasma will produce clots that will clog the capillaries. Type O blood group individuals are without $A$ and $B$ antigens on their RBCs, but consists antibodies for both these antigens in their plasma. Hence, these persons can donate blood to anyone. O blood group is the most important blood group for transfusion.
NCERT Page-280 / N-195
Body fluids and circulation
278427
Assertion: Fibrins are produced by the conversion of inactive fibrinogens in the plasma, in the presence of enzyme thrombin.
Reason: Plasma without fibrinogen and blood corpuscles is called serum. $\text{ }\!\!~\!\!\text{ }$
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) A coagulam is mainly formed of a network of threads (called fibrins) in which dead and damaged formed elements of blood are trapped. Fibrins are produced by the conversion of inactive fibrinogens in the plasma by the enzyme thrombin. Thrombin are formed from another inactive substance present in the plasma called prothrombin. An enzyme complex, prothrombinase, is required for the above reaction.
The clot seals the wound and stops bleeding. After its formation, clot starts contracting and a pale yellow fluid, the serum, oozes out. This serum is blood plasma minus fibrinogen and blood corpuscles.
NCERT Page-279 & 281 / N-194
Body fluids and circulation
278428
Assertion: Left atrium possesses the thickest muscles.
Reason: Left atrium receives blood from the lungs.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) Left ventricle has thickest muscles because it has to pump the blood further around the body and against higher pressure, compared with right ventricle. The left atrium recieves blood from the lungs which is rich in oxygen.
NCERT Page-283 / N-198
Body fluids and circulation
278429
Assertion: When a person is performing normal work. On an average, his heart beat is 72-75 heart beats per minute. Reason: One heart beat is completed in 0.8 second.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(d) One heart beat completes in $0.8-0.83$ second. therefore, there are $60/0.8$ or $60/0.83$, i.e., $72-75$ heart beats per minute on an average when a person is performing normal work.
278425
Assertion: In lymphatic system, lymph is known as tissue fluid.
Reason: It comprises of plasma proteins, RBCs and WBCs.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) Lymphatic system comprises of lymph, lymphatic capillaries, lymphatic vessels, lymphatic nodes and lymphatic ducts. Lymph is a transparent fluid derived from blood and other tissues, that accumulates in the interstitial spaces as the interstitial fluid. It also contains leucocytes, mainly the lymphocytes. This fluid has a composition similar to that of plasma, except that it is low in proteins.
NCERT Page-282 / N-197
Body fluids and circulation
278426
Assertion: Type ' $O$ ' blood group individuals are called 'universal donors'.
Reason: RBCs of ' $O$ ' blood group consists both ' $A$ ' and 'B' surface antigens.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) If a blood transfusion is made between an incompatible donor and recipient, reaction of antigens on the cells and antibodies in the plasma will produce clots that will clog the capillaries. Type O blood group individuals are without $A$ and $B$ antigens on their RBCs, but consists antibodies for both these antigens in their plasma. Hence, these persons can donate blood to anyone. O blood group is the most important blood group for transfusion.
NCERT Page-280 / N-195
Body fluids and circulation
278427
Assertion: Fibrins are produced by the conversion of inactive fibrinogens in the plasma, in the presence of enzyme thrombin.
Reason: Plasma without fibrinogen and blood corpuscles is called serum. $\text{ }\!\!~\!\!\text{ }$
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) A coagulam is mainly formed of a network of threads (called fibrins) in which dead and damaged formed elements of blood are trapped. Fibrins are produced by the conversion of inactive fibrinogens in the plasma by the enzyme thrombin. Thrombin are formed from another inactive substance present in the plasma called prothrombin. An enzyme complex, prothrombinase, is required for the above reaction.
The clot seals the wound and stops bleeding. After its formation, clot starts contracting and a pale yellow fluid, the serum, oozes out. This serum is blood plasma minus fibrinogen and blood corpuscles.
NCERT Page-279 & 281 / N-194
Body fluids and circulation
278428
Assertion: Left atrium possesses the thickest muscles.
Reason: Left atrium receives blood from the lungs.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) Left ventricle has thickest muscles because it has to pump the blood further around the body and against higher pressure, compared with right ventricle. The left atrium recieves blood from the lungs which is rich in oxygen.
NCERT Page-283 / N-198
Body fluids and circulation
278429
Assertion: When a person is performing normal work. On an average, his heart beat is 72-75 heart beats per minute. Reason: One heart beat is completed in 0.8 second.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(d) One heart beat completes in $0.8-0.83$ second. therefore, there are $60/0.8$ or $60/0.83$, i.e., $72-75$ heart beats per minute on an average when a person is performing normal work.
278425
Assertion: In lymphatic system, lymph is known as tissue fluid.
Reason: It comprises of plasma proteins, RBCs and WBCs.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) Lymphatic system comprises of lymph, lymphatic capillaries, lymphatic vessels, lymphatic nodes and lymphatic ducts. Lymph is a transparent fluid derived from blood and other tissues, that accumulates in the interstitial spaces as the interstitial fluid. It also contains leucocytes, mainly the lymphocytes. This fluid has a composition similar to that of plasma, except that it is low in proteins.
NCERT Page-282 / N-197
Body fluids and circulation
278426
Assertion: Type ' $O$ ' blood group individuals are called 'universal donors'.
Reason: RBCs of ' $O$ ' blood group consists both ' $A$ ' and 'B' surface antigens.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) If a blood transfusion is made between an incompatible donor and recipient, reaction of antigens on the cells and antibodies in the plasma will produce clots that will clog the capillaries. Type O blood group individuals are without $A$ and $B$ antigens on their RBCs, but consists antibodies for both these antigens in their plasma. Hence, these persons can donate blood to anyone. O blood group is the most important blood group for transfusion.
NCERT Page-280 / N-195
Body fluids and circulation
278427
Assertion: Fibrins are produced by the conversion of inactive fibrinogens in the plasma, in the presence of enzyme thrombin.
Reason: Plasma without fibrinogen and blood corpuscles is called serum. $\text{ }\!\!~\!\!\text{ }$
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) A coagulam is mainly formed of a network of threads (called fibrins) in which dead and damaged formed elements of blood are trapped. Fibrins are produced by the conversion of inactive fibrinogens in the plasma by the enzyme thrombin. Thrombin are formed from another inactive substance present in the plasma called prothrombin. An enzyme complex, prothrombinase, is required for the above reaction.
The clot seals the wound and stops bleeding. After its formation, clot starts contracting and a pale yellow fluid, the serum, oozes out. This serum is blood plasma minus fibrinogen and blood corpuscles.
NCERT Page-279 & 281 / N-194
Body fluids and circulation
278428
Assertion: Left atrium possesses the thickest muscles.
Reason: Left atrium receives blood from the lungs.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) Left ventricle has thickest muscles because it has to pump the blood further around the body and against higher pressure, compared with right ventricle. The left atrium recieves blood from the lungs which is rich in oxygen.
NCERT Page-283 / N-198
Body fluids and circulation
278429
Assertion: When a person is performing normal work. On an average, his heart beat is 72-75 heart beats per minute. Reason: One heart beat is completed in 0.8 second.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(d) One heart beat completes in $0.8-0.83$ second. therefore, there are $60/0.8$ or $60/0.83$, i.e., $72-75$ heart beats per minute on an average when a person is performing normal work.
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Body fluids and circulation
278425
Assertion: In lymphatic system, lymph is known as tissue fluid.
Reason: It comprises of plasma proteins, RBCs and WBCs.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) Lymphatic system comprises of lymph, lymphatic capillaries, lymphatic vessels, lymphatic nodes and lymphatic ducts. Lymph is a transparent fluid derived from blood and other tissues, that accumulates in the interstitial spaces as the interstitial fluid. It also contains leucocytes, mainly the lymphocytes. This fluid has a composition similar to that of plasma, except that it is low in proteins.
NCERT Page-282 / N-197
Body fluids and circulation
278426
Assertion: Type ' $O$ ' blood group individuals are called 'universal donors'.
Reason: RBCs of ' $O$ ' blood group consists both ' $A$ ' and 'B' surface antigens.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) If a blood transfusion is made between an incompatible donor and recipient, reaction of antigens on the cells and antibodies in the plasma will produce clots that will clog the capillaries. Type O blood group individuals are without $A$ and $B$ antigens on their RBCs, but consists antibodies for both these antigens in their plasma. Hence, these persons can donate blood to anyone. O blood group is the most important blood group for transfusion.
NCERT Page-280 / N-195
Body fluids and circulation
278427
Assertion: Fibrins are produced by the conversion of inactive fibrinogens in the plasma, in the presence of enzyme thrombin.
Reason: Plasma without fibrinogen and blood corpuscles is called serum. $\text{ }\!\!~\!\!\text{ }$
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) A coagulam is mainly formed of a network of threads (called fibrins) in which dead and damaged formed elements of blood are trapped. Fibrins are produced by the conversion of inactive fibrinogens in the plasma by the enzyme thrombin. Thrombin are formed from another inactive substance present in the plasma called prothrombin. An enzyme complex, prothrombinase, is required for the above reaction.
The clot seals the wound and stops bleeding. After its formation, clot starts contracting and a pale yellow fluid, the serum, oozes out. This serum is blood plasma minus fibrinogen and blood corpuscles.
NCERT Page-279 & 281 / N-194
Body fluids and circulation
278428
Assertion: Left atrium possesses the thickest muscles.
Reason: Left atrium receives blood from the lungs.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) Left ventricle has thickest muscles because it has to pump the blood further around the body and against higher pressure, compared with right ventricle. The left atrium recieves blood from the lungs which is rich in oxygen.
NCERT Page-283 / N-198
Body fluids and circulation
278429
Assertion: When a person is performing normal work. On an average, his heart beat is 72-75 heart beats per minute. Reason: One heart beat is completed in 0.8 second.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(d) One heart beat completes in $0.8-0.83$ second. therefore, there are $60/0.8$ or $60/0.83$, i.e., $72-75$ heart beats per minute on an average when a person is performing normal work.
278425
Assertion: In lymphatic system, lymph is known as tissue fluid.
Reason: It comprises of plasma proteins, RBCs and WBCs.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) Lymphatic system comprises of lymph, lymphatic capillaries, lymphatic vessels, lymphatic nodes and lymphatic ducts. Lymph is a transparent fluid derived from blood and other tissues, that accumulates in the interstitial spaces as the interstitial fluid. It also contains leucocytes, mainly the lymphocytes. This fluid has a composition similar to that of plasma, except that it is low in proteins.
NCERT Page-282 / N-197
Body fluids and circulation
278426
Assertion: Type ' $O$ ' blood group individuals are called 'universal donors'.
Reason: RBCs of ' $O$ ' blood group consists both ' $A$ ' and 'B' surface antigens.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(b) If a blood transfusion is made between an incompatible donor and recipient, reaction of antigens on the cells and antibodies in the plasma will produce clots that will clog the capillaries. Type O blood group individuals are without $A$ and $B$ antigens on their RBCs, but consists antibodies for both these antigens in their plasma. Hence, these persons can donate blood to anyone. O blood group is the most important blood group for transfusion.
NCERT Page-280 / N-195
Body fluids and circulation
278427
Assertion: Fibrins are produced by the conversion of inactive fibrinogens in the plasma, in the presence of enzyme thrombin.
Reason: Plasma without fibrinogen and blood corpuscles is called serum. $\text{ }\!\!~\!\!\text{ }$
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) A coagulam is mainly formed of a network of threads (called fibrins) in which dead and damaged formed elements of blood are trapped. Fibrins are produced by the conversion of inactive fibrinogens in the plasma by the enzyme thrombin. Thrombin are formed from another inactive substance present in the plasma called prothrombin. An enzyme complex, prothrombinase, is required for the above reaction.
The clot seals the wound and stops bleeding. After its formation, clot starts contracting and a pale yellow fluid, the serum, oozes out. This serum is blood plasma minus fibrinogen and blood corpuscles.
NCERT Page-279 & 281 / N-194
Body fluids and circulation
278428
Assertion: Left atrium possesses the thickest muscles.
Reason: Left atrium receives blood from the lungs.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(a) Left ventricle has thickest muscles because it has to pump the blood further around the body and against higher pressure, compared with right ventricle. The left atrium recieves blood from the lungs which is rich in oxygen.
NCERT Page-283 / N-198
Body fluids and circulation
278429
Assertion: When a person is performing normal work. On an average, his heart beat is 72-75 heart beats per minute. Reason: One heart beat is completed in 0.8 second.
1 Both (A) and (R) are correct but (R) is not the correct explanation of(A)
2 (A) is correct but (R) is not correct
3 (A) is not correct but (R) is correct
4 Both(A) and (R) are correct and (R) is the correct explanation of (A)
Explanation:
(d) One heart beat completes in $0.8-0.83$ second. therefore, there are $60/0.8$ or $60/0.83$, i.e., $72-75$ heart beats per minute on an average when a person is performing normal work.