Consider the following statements about human blood:
I: Red blood cells in humans have a nucleus.
II: Blood plasma contains fibrinogen which helps in clotting.
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statements are correct.
4. Neither Statement is correct.

Subtopic:  Blood: General Description & RBC |
 92%
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The main consequence of a blockage in the coronary artery is most likely to be:
1. Reduced oxygen supply to the brain.
2. Increased blood pressure.
3. Myocardial infarction (heart attack).
4. Decrease in venous return.
Subtopic:   DISORDERS OF CIRCULATORY SYSTEM |
 79%
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What does the 'P' wave in an ECG represent?
1. Ventricular depolarization
2. Atrial repolarization
3. Ventricular repolarization
4. Atrial depolarization
Subtopic:  ECG & Coronary Artery Disease |
 91%
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Match the following blood components with their functions:
Component (List I) Function (List II)
A. Plasma 1. Transport of oxygen and carbon dioxide
B. Red Blood Cells (RBCs) 2. Clot formation
C. White Blood Cells (WBCs) 3. Regulation of blood volume and pressure
D. Platelets 4. Defense against pathogens
 
1. A-1, B-2, C-4, D-3
2. A-3, B-1, C-4, D-2
3. A-3, B-1, C-2, D-4
4. A-2, B-4, C-1, D-3
Subtopic:  Blood: General Description & RBC |
 94%
From NCERT
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Consider the given two statements:
Assertion(A): Blood flows through the human heart in a single, continuous circuit.
Reason(R): The human heart has four chambers - two auricles and two ventricles.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.
Subtopic:  Human Heart: Gross Anatomy | Human Heart: Double Circulation |
 85%
From NCERT
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Consider the given two statements:
Assertion(A): Individuals with type AB blood are universal recipients for blood transfusions.
Reason(R): They possess neither A nor B antigens on their red blood cells.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.
Subtopic:  Blood: Blood Group (A,B,O) |
 84%
From NCERT
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Consider the given two statements: 
Assertion (A): The parasympathetic nervous system increases cardiac output. 
Reason (R): The parasympathetic nervous system increases the heart rate and the strength of the heartbeat.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A)
2. Both (A) and (R) are True but (R) is not the correct explanation of (A)
3. (A) is False, (R) is False. 
4. (A) is False, (R) is True.
Subtopic:  Regulation of Cardiac Activity |
 75%
From NCERT
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The clotting of blood is an important function attributed in human blood to: 
1. Erythrocytes 
2. Leukocytes 
3. Thrombocytes 
4. Neutrophils
Subtopic:  Blood: Blood Clotting |
 98%
From NCERT
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During the cardiac cycle:
1. The atrioventricular valves open during systole
2. The ventricles contract during diastole
3. The semilunar valves open during ventricular systole
4. Atrial systole occurs simultaneously with ventricular systole
Subtopic:  Human Heart: Cardiac Cycle |
 84%
From NCERT
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In the ABO blood group system, the blood type AB means:
1. Anti-A and anti-B antibodies are present in the plasma
2. The absence of A and B antigens on the red cells
3. The presence of both A and B antigens on the red cells
4. The presence of anti-A and anti-B antigens on the red cells
Subtopic:  Blood: Blood Group (A,B,O) |
 88%
From NCERT
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