1 No antigens but both$a$ and $b$ antibodies are present
2 A antigen and b antibody
3 Antigen and antibody both absent
4 $\text{A}$ and $\text{B}$ antigens and $\text{a},\text{b}$ antibodies
Explanation:
(a) Blood group ' $\text{O}$ ' is known as the universal donor since, it does not contain antigens.
NCERT Page-280 / N-195
BODY FLUIDS and CIRCULATION(NCERT)
285915
Rh factor is named after
1 monkey
2 Drosophila
3 rat
4 man
Explanation:
(a) Rh factor is named after the Rhesus monkey. Experiments by Karl Landsteiner and Alexander S. Wiener, showed that rabbits, when immunised with rhesus monkey red cells, produce an antibody that also agglutinates the red blood cells of many humans.
NCERT Page-281 / N-196
BODY FLUIDS and CIRCULATION(NCERT)
285916
_____plays an important role in blood clotting.
1 Sodium
2 Chlorine
3 Calcium
4 Potassium
Explanation:
(c) Blood clotting (coagulation) is the process by which blood vessels repair ruptures after injury. Injury repair actually begins even before clotting does, through vascular spasm, or muscular contraction of the vessel walls, which reduces blood loss. Clotting itself is a complex cascade of reactions involving platelets, enzyme, and structural proteins. Calcium plays an important role by working together with vitamin $K$ and a protein called fibrinogen in the clotting cascade.
NCERT Page-281 / N-196
BODY FLUIDS and CIRCULATION(NCERT)
285917
Antigens are present:
1 inside the nucleus
2 inside the cytoplasm (d)
3 on cell surface
4 on nuclear membrane
Explanation:
(b) Antigens are foreign proteins, which stimulate specific immune response (antibody) against itself when introduced into the body. They are present on the surface of cell wall.
1 No antigens but both$a$ and $b$ antibodies are present
2 A antigen and b antibody
3 Antigen and antibody both absent
4 $\text{A}$ and $\text{B}$ antigens and $\text{a},\text{b}$ antibodies
Explanation:
(a) Blood group ' $\text{O}$ ' is known as the universal donor since, it does not contain antigens.
NCERT Page-280 / N-195
BODY FLUIDS and CIRCULATION(NCERT)
285915
Rh factor is named after
1 monkey
2 Drosophila
3 rat
4 man
Explanation:
(a) Rh factor is named after the Rhesus monkey. Experiments by Karl Landsteiner and Alexander S. Wiener, showed that rabbits, when immunised with rhesus monkey red cells, produce an antibody that also agglutinates the red blood cells of many humans.
NCERT Page-281 / N-196
BODY FLUIDS and CIRCULATION(NCERT)
285916
_____plays an important role in blood clotting.
1 Sodium
2 Chlorine
3 Calcium
4 Potassium
Explanation:
(c) Blood clotting (coagulation) is the process by which blood vessels repair ruptures after injury. Injury repair actually begins even before clotting does, through vascular spasm, or muscular contraction of the vessel walls, which reduces blood loss. Clotting itself is a complex cascade of reactions involving platelets, enzyme, and structural proteins. Calcium plays an important role by working together with vitamin $K$ and a protein called fibrinogen in the clotting cascade.
NCERT Page-281 / N-196
BODY FLUIDS and CIRCULATION(NCERT)
285917
Antigens are present:
1 inside the nucleus
2 inside the cytoplasm (d)
3 on cell surface
4 on nuclear membrane
Explanation:
(b) Antigens are foreign proteins, which stimulate specific immune response (antibody) against itself when introduced into the body. They are present on the surface of cell wall.
1 No antigens but both$a$ and $b$ antibodies are present
2 A antigen and b antibody
3 Antigen and antibody both absent
4 $\text{A}$ and $\text{B}$ antigens and $\text{a},\text{b}$ antibodies
Explanation:
(a) Blood group ' $\text{O}$ ' is known as the universal donor since, it does not contain antigens.
NCERT Page-280 / N-195
BODY FLUIDS and CIRCULATION(NCERT)
285915
Rh factor is named after
1 monkey
2 Drosophila
3 rat
4 man
Explanation:
(a) Rh factor is named after the Rhesus monkey. Experiments by Karl Landsteiner and Alexander S. Wiener, showed that rabbits, when immunised with rhesus monkey red cells, produce an antibody that also agglutinates the red blood cells of many humans.
NCERT Page-281 / N-196
BODY FLUIDS and CIRCULATION(NCERT)
285916
_____plays an important role in blood clotting.
1 Sodium
2 Chlorine
3 Calcium
4 Potassium
Explanation:
(c) Blood clotting (coagulation) is the process by which blood vessels repair ruptures after injury. Injury repair actually begins even before clotting does, through vascular spasm, or muscular contraction of the vessel walls, which reduces blood loss. Clotting itself is a complex cascade of reactions involving platelets, enzyme, and structural proteins. Calcium plays an important role by working together with vitamin $K$ and a protein called fibrinogen in the clotting cascade.
NCERT Page-281 / N-196
BODY FLUIDS and CIRCULATION(NCERT)
285917
Antigens are present:
1 inside the nucleus
2 inside the cytoplasm (d)
3 on cell surface
4 on nuclear membrane
Explanation:
(b) Antigens are foreign proteins, which stimulate specific immune response (antibody) against itself when introduced into the body. They are present on the surface of cell wall.
1 No antigens but both$a$ and $b$ antibodies are present
2 A antigen and b antibody
3 Antigen and antibody both absent
4 $\text{A}$ and $\text{B}$ antigens and $\text{a},\text{b}$ antibodies
Explanation:
(a) Blood group ' $\text{O}$ ' is known as the universal donor since, it does not contain antigens.
NCERT Page-280 / N-195
BODY FLUIDS and CIRCULATION(NCERT)
285915
Rh factor is named after
1 monkey
2 Drosophila
3 rat
4 man
Explanation:
(a) Rh factor is named after the Rhesus monkey. Experiments by Karl Landsteiner and Alexander S. Wiener, showed that rabbits, when immunised with rhesus monkey red cells, produce an antibody that also agglutinates the red blood cells of many humans.
NCERT Page-281 / N-196
BODY FLUIDS and CIRCULATION(NCERT)
285916
_____plays an important role in blood clotting.
1 Sodium
2 Chlorine
3 Calcium
4 Potassium
Explanation:
(c) Blood clotting (coagulation) is the process by which blood vessels repair ruptures after injury. Injury repair actually begins even before clotting does, through vascular spasm, or muscular contraction of the vessel walls, which reduces blood loss. Clotting itself is a complex cascade of reactions involving platelets, enzyme, and structural proteins. Calcium plays an important role by working together with vitamin $K$ and a protein called fibrinogen in the clotting cascade.
NCERT Page-281 / N-196
BODY FLUIDS and CIRCULATION(NCERT)
285917
Antigens are present:
1 inside the nucleus
2 inside the cytoplasm (d)
3 on cell surface
4 on nuclear membrane
Explanation:
(b) Antigens are foreign proteins, which stimulate specific immune response (antibody) against itself when introduced into the body. They are present on the surface of cell wall.
