Q. No.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
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 |
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.
A person has a complete blood count done. Which of the following would not be normal?
1. total RBC count - 5.0 million /µL
2. total WBC count – 1500 /µL
3. total platelet count - 225,000 /µL
4. hemoglobin – 14.5 g / 100 ml
What is true for the blood Type O?
| 1. | It is universal donor because it has neither anti-A antibodies nor anti-B antibodies circulating in the plasma. |
| 2. | It is universal donor because it has neither antigen A nor antigen B on its RBCs. |
| 3. | It is universal recipient because it has neither anti-A antibodies nor anti-B antibodies circulating in the plasma. |
| 4. | It is universal recipient because it has neither antigen A nor antigen B on its RBCs. |
Purkinje fibers are:
| 1. | Intrinsic neural fibers in the ventricles |
| 2. | Muscle fibers that interconnect SA node and AV node |
| 3. | Muscle fibers that are distributed in the ventricular musculature |
| 4. | Neural fibers that spread the impulse throughout the ventricular muscle mass |
On a surface ECG, the end of ventricular systole is marked by:
| 1. | The end of the QRS complex |
| 2. | The beginning of T wave |
| 3. | The end of T wave |
| 4. | The beginning of P wave |
Sympathetic stimulation would lead to:
1. increased heart rate.
2. increased stroke volume.
3. vasoconstriction in visceral blood vessels.
4. all of the above.
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 |
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