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Q. No.Subtopic: Blood: Blood Clotting |
86%
From NCERT
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Lymph does not contain:
| 1. | proteins | 2. | microorganisms |
| 3. | red blood cells and platelets | 4. | minerals |
Subtopic: Lymph |
79%
From NCERT
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The sinoatrial node is the normal pacemaker of the human heart because it:
| 1. | can form action potentials that can spread throughout the rest of the heart |
| 2. | depolarizes to its threshold potential before other pacemakers in the heart |
| 3. | is located in the top of right atrial wall |
| 4. | is most likely to form an ectopic focus |
Subtopic: Human Heart: Double Circulation |
From NCERT
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The average life span of human red blood cells is:
| 1. | 10 days | 2. | 120 days |
| 3. | 21 days | 4. | three months |
Subtopic: Blood: General Description & RBC |
97%
From NCERT
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A chest pain or pressure, usually due to not enough blood flow to the heart muscle, is known as:
| 1. | hypoxia | 2. | infarction |
| 3. | angina | 4. | diaphoresis |
Subtopic: ECG & Coronary Artery Disease |
88%
From NCERT
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What is the percentage of atrial blood that flows into the ventricles without atrial systole?
| 1. | 90 | 2. | 70 |
| 3. | 50 | 4. | 30 |
Subtopic: Human Heart: Cardiac Cycle |
73%
From NCERT
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QRS complexes on the ECG tracings show that:
1. The atria are depolarizing.
2. The ventricles are depolarizing.
3. The ventricles are repolarizing.
4. The heart is at rest.
Subtopic: ECG & Coronary Artery Disease |
92%
From NCERT
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Pulmonary veins return the oxygenated blood from the lungs to:
| 1. | right atrium | 2. | left atrium |
| 3. | right ventricle | 4. | left ventricle |
Subtopic: Human Heart: Double Circulation |
84%
From NCERT
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Erythrocytes in humans are destroyed mainly in:
| 1. | liver and spleen | 2. | heart and lungs |
| 3. | bone marrow | 4. | kidney |
Subtopic: Blood: General Description & RBC |
95%
From NCERT
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The most common WBC under normal physiological conditions are:
| 1. | Neutrophils | 2. | Macrophages |
| 3. | Monocytes | 4. | Lymphocytes |
Subtopic: Blood: White Blood Cells |
84%
From NCERT
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