SAN is responsible for

(1) initiating and maintaining a random contractile ability of heart

(2) initiating and maintaining a rhythmic contractile ability of heart

(3) maintaining a random contractile ability of heart

(4) Initiating a rhythmic contractile ability of heart

Subtopic:  Rhythmic Excitation of Human Heart: Part 1 |
 86%
From NCERT
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Semilunar valves are found between

1. left ventricle and aorta

2. right ventricle and pulmonary artery

3. left ventricle and pulmonary vein

4. both (1) and (2)

Subtopic:  Human Heart: Gross Anatomy |
 81%
From NCERT
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Bicuspid valves are present between

(1) left atria and aorta

(2) right atria and pulmonary artery

(3) left atria and left ventricle

(4) right atria and right ventricle

Subtopic:  Human Heart: Gross Anatomy |
 87%
From NCERT
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Match the following:

p. Lymph                e. Amphibians
q.   Mixed Blood      f.   Tissue Fluid
r. Fibrins                 g. RBC
s. Rh antigen         h. Blood Clot

1. p–g; q–h; r–e; s–f

2. p–f; q–e; r–h; s–g

3. p–e; q–h; r–f; s–g

4. p–f; q–g; r–h; s–e

Subtopic:  Blood: Blood Group | Blood: Blood Clotting | Lymph |
 93%
From NCERT
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Platelets are formed from–

(1) Megakaryoblast

(2) Megakaryocyte

(3) Macrokaryoblast

(4) Macrophages

Subtopic:  Blood: Blood Clotting |
 89%
From NCERT
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______ population has Rh ______ on the surface of ______ present in their ______.

(1) 20%, antigen, platelets, plasma

(2) 80%, antigen, RBC, blood

(3) 80%, antibody, platelet, plasma

(4) 20%, antibody, RBC, blood

Subtopic:  Blood: Blood Group |
 91%
From NCERT
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ABO blood grouping is based on

(1) presence of two soluble antibodies

(2) absence of two surface antigens

(3) presence of two surface antigens

(4) both (2) and (3)

Subtopic:  Blood: Blood Group (A,B,O) |
 66%
From NCERT
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If a person gets his blood count done from a lab and finds his platelets to be 20000 and then meets an accident on that day. Which of the following is correct?

(1) as the platelet count is normal, there will be no harm to him because of platelets.

(2) Clotting disorders

(3) Severe Blood loss from body

(4) both (2) and (3)

Subtopic:  Blood: Blood Clotting |
 88%
From NCERT
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The number of RBC in a healthy individual are:

(1) 5 million to 5.5 million RBCs

(2) 5 billion to 5.5 billion RBCs

(3) 1 million to 1.5 million RBCs

(4) 1 billion to 1.5 billion RBCs

Subtopic:  Blood: General Description & RBC: Part 1 | Blood: General Description & RBC |
 94%
From NCERT
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The transport of respiratory gases is taken care by which blood component?

(1) RBC

(2) WBC

(3) Platelets

(4) Fibrinogen

Subtopic:  Blood: General Description & RBC: Part 2 | Blood: General Description & RBC |
 95%
From NCERT
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