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Q. No.The life span of the erythrocytes in humans is about:
1.
120 days
2.
150 days
3.
190 days
4.
180 days
Subtopic: Blood: General Description & RBC |
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Atherosclerosis affects:
| 1. | the vessel which supply blood to kidney |
| 2. | the vessel which supply blood to brain |
| 3. | the vessel which supply blood to heart muscle |
| 4. | the vessel which supply blood to lungs |
Subtopic: Atherosclerosis, Hypertension & Ventricular Fibrillation |
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Which of the following is associated with a decrease in cardiac output?
| 1. | Sympathetic nerves |
| 2. | Parasympathetic neural signals |
| 3. | Pneumotaxic center |
| 4. | Adrenal medullary hormones |
Subtopic: Regulation of Cardiac Activity |
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The stroke volume of left ventricle in a person is 75 ml. His cardiac output is 6000 ml. What will be his heart rate?
| 1. | 72 per minute | 2. | 75 per minute |
| 3. | 80 per minute | 4. | 100 per minute |
Subtopic: Human Heart: Cardiac Cycle |
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A cardiovascular centre that can moderate the cardiac function through the autonomic neural system is located in the:
| 1. | Pons varoli | 2. | Medulla oblongata |
| 3. | Hypothalamus | 4. | Cerebrum |
Subtopic: Regulation of Cardiac Activity |
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A drop of each of the following is placed separately on four slides. Which of them will not coagulate?
| 1. | Whole blood from pulmonary vein |
| 2. | Blood plasma |
| 3. | Blood serum |
| 4. | Sample from the thoracic duct of lymphatic system |
Subtopic: Blood: General Description & RBC |
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In a cardiac cycle, joint diastole state correctly means:
| 1. | only the two atria are in a relaxed state |
| 2. | only the two ventricles are in a relaxed state |
| 3. | ventricles and atria are in a relaxed state |
| 4. | only the left atrium and the left ventricle are in a relaxed state |
Subtopic: Human Heart: Cardiac Cycle |
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Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body.
| 1. | Erythrocytes | 2. | Leucocytes |
| 3. | Neutrophils | 4. | Thrombocytes |
Subtopic: Blood: Blood Clotting |
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Cardiac output can be increased by:
| I: | Neural signals through sympathetic nerves |
| II: | Neural signals through parasympathetic nerves |
| III: | Adrenal medullary hormones |
| 1. | Only I and II |
| 2. | Only I and III |
| 3. | Only II and III |
| 4. | I, II and III |
Subtopic: Regulation of Cardiac Activity |
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Doctors use a stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when
| 1. | AV valves open up |
| 2. | Ventricular walls vibrate due to gushing in of blood from atria |
| 3. | Semilunar valves close down after the blood flows into vessels from ventricles |
| 4. | AV node receives the signal from SA node |
Subtopic: Human Heart: Cardiac Cycle |
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