Q. No.In a normal ECG, The T wave represents:
1.
ventricular depolarization
2.
atrial repolarization
3.
ventricular repolarization
4.
atrial depolarization
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The chamber with the thickest musculature in the human heart would be:
| 1. the right atrium | 2. the left atrium |
| 3. the left ventricle | 4. the right ventricle |
The correct path of circulation of the blood in the human heart is represented by:
| 1. | left atrium, left ventricle, lungs, right atrium, right ventricle, body |
| 2. | right atrium, right ventricle, lungs, left atrium, left ventricle, body |
| 3. | left atrium, left ventricle, right atrium, right ventricle, lungs, body |
| 4. | right atrium, lungs, right ventricle, left atrium, body, left ventricle |
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Sympathetic stimulation would lead to:
1. increased heart rate.
2. increased stroke volume.
3. vasoconstriction in visceral blood vessels.
4. all of the above.
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The innermost layer of blood vessel walls made up of one layer of endothelium and in direct contact with the blood is:
| 1. tunica adventitia | 2. tunica intima |
| 3. tunica media | 4. tunica muscularis |
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The build-up of fats, cholesterol and other substances in and on the artery walls is known as:
| 1. | arteriosclerosis | 2. | atherosclerosis |
| 3. | aneurysm | 4. | anastomosis |
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The semilunar valves will open during a normal cardiac cycle when the pressure in the left ventricle is
1. greater than the pressure in the aorta.
2. less than the pressure in the aorta.
3. the same as the pressure in the aorat.
4. less than the pressure in the left atrium.
Cardiac output is defined as
1. blood pressure X stroke volume.
2. peripheral resistance X heart rate.
3. heart rate X stroke volume.
4. Systolic pressure – diastolic pressure.
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The location of the human heart is most accurately described as:
| 1. | mediastinum of the lungs. |
| 2. | mediastinum of the pericardium. |
| 3. | mediastinum, which is located in the thoracic cavity. |
| 4. | thoracic cavity, which is located in the mediastinum. |
The right ventricle of the heart pumps blood into the:
| 1. | pulmonary circulation | 2. | systemic circulation |
| 3. | coronary circulation | 4. | portal circulation |
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