1 Their sudden fall in number is indication of blood cancer
2 These are produced in thymus
3 These are enucleated
4 They are colourless due to lack of haemoglobin
Explanation:
(d) Leucocytes are colourless, nucleated amoeboid cells found in blood which are devoid of haemoglobin and are capable of coming out of blood capillaries through the process of diapedesis. Fall of WBC count is called leucopenia, and occurs due to folic acid deficiency and AIDS, etc.
NCERT Page-279 / N-194
Body fluids and circulation
278302
Red blood cells are:
1 biconcave cells containing haemoglobin.
2 spherical cells containing haemoglobin.
3 spherical cells capable of amoeboid motion and containing haemoglobin.
4 biconcave cells that contain platelets.
Explanation:
(a) Red blood cells are biconcave cells that contain the oxygen-binding haemoglobin.
NCERT Page-279 / N-194
Body fluids and circulation
278303
In blood
1 WBCs are more than RBCs
2 RBCs are more than WBCs
3 RBCs are less than platelets
4 Platelets are less than WBCs
Explanation:
(b)
NCERT Page-279 / N-194
Body fluids and circulation
278304
Which one engulfs pathogens rapidly?
1 Acidophils
2 Monocytes
3 Basophils
4 Neutrophils
Explanation:
(d) Neutrophils are a type of leucocyte (WBCs) that can take all types of stain (acid-basic-Neutral). It is most abundant ( $60-70\text{ }\!\!%\!\!\text{ }$ of total WBCs) and most active type of WBCs i.e., they are the most actively phagocytic in nature.
NCERT Page-279 / N-194
Body fluids and circulation
278306
Which of the following is responsible for $\text{ABO}$ grouping?
1 Presence or absence of clotting factors.
2 Compatibility of blood groups during blood transfusion.
3 Presence or absence of surface antigens ($A$ and $B$ ) on WBCs.
4 Presence or absence of two surface antigens ($A$ and $B$ ) on the RBCs.
Explanation:
(d) $ABO$ grouping is the classification of human blood based on the inherited properties of red blood cells (erythrocytes). It is determined by the presence or absence of the antigens $A$ and $B$, which are carried on the surface of the red cells. Persons may thus have type A, type B, type O, or type AB blood. The A, B, and $O$ blood groups were first identified by Austrian immunologist Karl Landsteiner in 1901.
1 Their sudden fall in number is indication of blood cancer
2 These are produced in thymus
3 These are enucleated
4 They are colourless due to lack of haemoglobin
Explanation:
(d) Leucocytes are colourless, nucleated amoeboid cells found in blood which are devoid of haemoglobin and are capable of coming out of blood capillaries through the process of diapedesis. Fall of WBC count is called leucopenia, and occurs due to folic acid deficiency and AIDS, etc.
NCERT Page-279 / N-194
Body fluids and circulation
278302
Red blood cells are:
1 biconcave cells containing haemoglobin.
2 spherical cells containing haemoglobin.
3 spherical cells capable of amoeboid motion and containing haemoglobin.
4 biconcave cells that contain platelets.
Explanation:
(a) Red blood cells are biconcave cells that contain the oxygen-binding haemoglobin.
NCERT Page-279 / N-194
Body fluids and circulation
278303
In blood
1 WBCs are more than RBCs
2 RBCs are more than WBCs
3 RBCs are less than platelets
4 Platelets are less than WBCs
Explanation:
(b)
NCERT Page-279 / N-194
Body fluids and circulation
278304
Which one engulfs pathogens rapidly?
1 Acidophils
2 Monocytes
3 Basophils
4 Neutrophils
Explanation:
(d) Neutrophils are a type of leucocyte (WBCs) that can take all types of stain (acid-basic-Neutral). It is most abundant ( $60-70\text{ }\!\!%\!\!\text{ }$ of total WBCs) and most active type of WBCs i.e., they are the most actively phagocytic in nature.
NCERT Page-279 / N-194
Body fluids and circulation
278306
Which of the following is responsible for $\text{ABO}$ grouping?
1 Presence or absence of clotting factors.
2 Compatibility of blood groups during blood transfusion.
3 Presence or absence of surface antigens ($A$ and $B$ ) on WBCs.
4 Presence or absence of two surface antigens ($A$ and $B$ ) on the RBCs.
Explanation:
(d) $ABO$ grouping is the classification of human blood based on the inherited properties of red blood cells (erythrocytes). It is determined by the presence or absence of the antigens $A$ and $B$, which are carried on the surface of the red cells. Persons may thus have type A, type B, type O, or type AB blood. The A, B, and $O$ blood groups were first identified by Austrian immunologist Karl Landsteiner in 1901.
1 Their sudden fall in number is indication of blood cancer
2 These are produced in thymus
3 These are enucleated
4 They are colourless due to lack of haemoglobin
Explanation:
(d) Leucocytes are colourless, nucleated amoeboid cells found in blood which are devoid of haemoglobin and are capable of coming out of blood capillaries through the process of diapedesis. Fall of WBC count is called leucopenia, and occurs due to folic acid deficiency and AIDS, etc.
NCERT Page-279 / N-194
Body fluids and circulation
278302
Red blood cells are:
1 biconcave cells containing haemoglobin.
2 spherical cells containing haemoglobin.
3 spherical cells capable of amoeboid motion and containing haemoglobin.
4 biconcave cells that contain platelets.
Explanation:
(a) Red blood cells are biconcave cells that contain the oxygen-binding haemoglobin.
NCERT Page-279 / N-194
Body fluids and circulation
278303
In blood
1 WBCs are more than RBCs
2 RBCs are more than WBCs
3 RBCs are less than platelets
4 Platelets are less than WBCs
Explanation:
(b)
NCERT Page-279 / N-194
Body fluids and circulation
278304
Which one engulfs pathogens rapidly?
1 Acidophils
2 Monocytes
3 Basophils
4 Neutrophils
Explanation:
(d) Neutrophils are a type of leucocyte (WBCs) that can take all types of stain (acid-basic-Neutral). It is most abundant ( $60-70\text{ }\!\!%\!\!\text{ }$ of total WBCs) and most active type of WBCs i.e., they are the most actively phagocytic in nature.
NCERT Page-279 / N-194
Body fluids and circulation
278306
Which of the following is responsible for $\text{ABO}$ grouping?
1 Presence or absence of clotting factors.
2 Compatibility of blood groups during blood transfusion.
3 Presence or absence of surface antigens ($A$ and $B$ ) on WBCs.
4 Presence or absence of two surface antigens ($A$ and $B$ ) on the RBCs.
Explanation:
(d) $ABO$ grouping is the classification of human blood based on the inherited properties of red blood cells (erythrocytes). It is determined by the presence or absence of the antigens $A$ and $B$, which are carried on the surface of the red cells. Persons may thus have type A, type B, type O, or type AB blood. The A, B, and $O$ blood groups were first identified by Austrian immunologist Karl Landsteiner in 1901.
1 Their sudden fall in number is indication of blood cancer
2 These are produced in thymus
3 These are enucleated
4 They are colourless due to lack of haemoglobin
Explanation:
(d) Leucocytes are colourless, nucleated amoeboid cells found in blood which are devoid of haemoglobin and are capable of coming out of blood capillaries through the process of diapedesis. Fall of WBC count is called leucopenia, and occurs due to folic acid deficiency and AIDS, etc.
NCERT Page-279 / N-194
Body fluids and circulation
278302
Red blood cells are:
1 biconcave cells containing haemoglobin.
2 spherical cells containing haemoglobin.
3 spherical cells capable of amoeboid motion and containing haemoglobin.
4 biconcave cells that contain platelets.
Explanation:
(a) Red blood cells are biconcave cells that contain the oxygen-binding haemoglobin.
NCERT Page-279 / N-194
Body fluids and circulation
278303
In blood
1 WBCs are more than RBCs
2 RBCs are more than WBCs
3 RBCs are less than platelets
4 Platelets are less than WBCs
Explanation:
(b)
NCERT Page-279 / N-194
Body fluids and circulation
278304
Which one engulfs pathogens rapidly?
1 Acidophils
2 Monocytes
3 Basophils
4 Neutrophils
Explanation:
(d) Neutrophils are a type of leucocyte (WBCs) that can take all types of stain (acid-basic-Neutral). It is most abundant ( $60-70\text{ }\!\!%\!\!\text{ }$ of total WBCs) and most active type of WBCs i.e., they are the most actively phagocytic in nature.
NCERT Page-279 / N-194
Body fluids and circulation
278306
Which of the following is responsible for $\text{ABO}$ grouping?
1 Presence or absence of clotting factors.
2 Compatibility of blood groups during blood transfusion.
3 Presence or absence of surface antigens ($A$ and $B$ ) on WBCs.
4 Presence or absence of two surface antigens ($A$ and $B$ ) on the RBCs.
Explanation:
(d) $ABO$ grouping is the classification of human blood based on the inherited properties of red blood cells (erythrocytes). It is determined by the presence or absence of the antigens $A$ and $B$, which are carried on the surface of the red cells. Persons may thus have type A, type B, type O, or type AB blood. The A, B, and $O$ blood groups were first identified by Austrian immunologist Karl Landsteiner in 1901.
1 Their sudden fall in number is indication of blood cancer
2 These are produced in thymus
3 These are enucleated
4 They are colourless due to lack of haemoglobin
Explanation:
(d) Leucocytes are colourless, nucleated amoeboid cells found in blood which are devoid of haemoglobin and are capable of coming out of blood capillaries through the process of diapedesis. Fall of WBC count is called leucopenia, and occurs due to folic acid deficiency and AIDS, etc.
NCERT Page-279 / N-194
Body fluids and circulation
278302
Red blood cells are:
1 biconcave cells containing haemoglobin.
2 spherical cells containing haemoglobin.
3 spherical cells capable of amoeboid motion and containing haemoglobin.
4 biconcave cells that contain platelets.
Explanation:
(a) Red blood cells are biconcave cells that contain the oxygen-binding haemoglobin.
NCERT Page-279 / N-194
Body fluids and circulation
278303
In blood
1 WBCs are more than RBCs
2 RBCs are more than WBCs
3 RBCs are less than platelets
4 Platelets are less than WBCs
Explanation:
(b)
NCERT Page-279 / N-194
Body fluids and circulation
278304
Which one engulfs pathogens rapidly?
1 Acidophils
2 Monocytes
3 Basophils
4 Neutrophils
Explanation:
(d) Neutrophils are a type of leucocyte (WBCs) that can take all types of stain (acid-basic-Neutral). It is most abundant ( $60-70\text{ }\!\!%\!\!\text{ }$ of total WBCs) and most active type of WBCs i.e., they are the most actively phagocytic in nature.
NCERT Page-279 / N-194
Body fluids and circulation
278306
Which of the following is responsible for $\text{ABO}$ grouping?
1 Presence or absence of clotting factors.
2 Compatibility of blood groups during blood transfusion.
3 Presence or absence of surface antigens ($A$ and $B$ ) on WBCs.
4 Presence or absence of two surface antigens ($A$ and $B$ ) on the RBCs.
Explanation:
(d) $ABO$ grouping is the classification of human blood based on the inherited properties of red blood cells (erythrocytes). It is determined by the presence or absence of the antigens $A$ and $B$, which are carried on the surface of the red cells. Persons may thus have type A, type B, type O, or type AB blood. The A, B, and $O$ blood groups were first identified by Austrian immunologist Karl Landsteiner in 1901.
