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 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 |
The atria receive:
1. | Oxygenated blood | 2. | Deoxygenated blood |
3. | Mixed blood | 4. | Venous blood |
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 |
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 |