What percentage of ventricular filling is achieved by atrial contraction?

1. 30

2. 50

3. 70

4. 90

Subtopic:  Human Heart: Double Circulation |
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In a surface ECG the QRS complex represents:

1. Atrial depolarization

2. Atrial repolarization

3. Ventricular depolarization

4. Ventricular repolarization

Subtopic:  ECG & Coronary Artery Disease |
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Normal activities of the human heart are regulated:

1. Intrinsically

2. By the autonomic nervous system

3. By the brain stem

4. By the diencephalon

Subtopic:  Rhythmic Excitation of Human Heart: Part 1 |
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A common symptom produced by myocardial ischemia is:

1. Hypertension

2. Vertigo

3. Angina

4. Hyperventilation

Subtopic:  Atherosclerosis, Hypertension & Ventricular Fibrillation |
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The steps of the cardiac cycle in sequence are...

1. isovolumic contraction, isovolumic relaxation, ejection, passive ventricular filling, active ventricular filling.

2. isovolumic relaxation, isovolumic contraction, ejection, passive ventricular filling, active ventricular filling.

3. isovolumic contraction, ejection, isovolumic relaxation, passive ventricular filling, active ventricular filling.

4. isovolumic contraction, ejection, isovolumic relaxation, active ventricular filling, passive ventricular filling

 

Subtopic:  Human Heart: Cardiac Cycle |
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A decrease in plasma albumin levels is likely to affect:

1. Clot formation

2. Oxygenation of hemoglobin

3. Osmotic balance

4. Immune functions

Subtopic:  Blood: General Description & RBC: Part 1 | Blood: General Description & RBC |
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Which of the following is a correct statement:

1. The volume of blood in pulmonary circulation is more than the volume of blood in systemic circulation at any instant

2. The blood pressure in pulmonary circulation is less than that of the systemic circulation

3. Double circulation is characteristic of all vertebrates

4. A double aortic arch is seen in birds and mammals

Subtopic:  Human Heart: Cardiac Cycle |
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There is a possibility of exposure of the maternal blood [of Rh -ve mother] to small amounts of Rh +ve blood from the fetus during the:

1. First trimester of any pregnancy

2. Third trimester of the second pregnancy only

3. Delivery of the child

4. There is no such possibility

Subtopic:  Blood: Blood Group |
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Choose the correct order for the steps of hemostasis:

1. Blood coagulation, platelet plug formation, blood vessel spasm

2. Platelet plug formation, blood coagulation, blood vessel spasm

3. Blood vessel spasm, platelet plug formation, blood coagulation

4. Blood vessel spasm, blood coagulation, platelet plug formation

Subtopic:  Blood: Blood Clotting |
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The right atria of the human heart receives:

1. Oxygenated blood

2. Deoxygenated blood

3. Arterial blood

4. Venous blood

Subtopic:  Human Heart: Double Circulation |
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