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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A resting heart rate of fewer than 60 beats per minute is:
1. tachycardia
2. bradycardia
3. flutter
4. fibrillation
In blood, the component that is neither a blood cell, nor a clotting factor would be called:
1. plasma
2. lymph
3. serum
4. puss
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What is true for RBCs of mammals when compared to RBCs of other vertebrates?
1. They undergo erythropoiesis
2. They are capable of phagocytosis
3. They secrete antibodies
4. They are multinucleate
The normal pacemaker of the human heart is the remnant [derivative] of:
1. chordate tendinae
2. bundle of His
3. conus arteriosus
4. sinus venosus
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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Blood vessels have smooth muscles in their walls that are innervated by:
1. myelinated motor neurons.
2. unmyelinated sympathetic neurons.
3. unmyelinated motor neurons.
4. unmyelinated parasympathetic neurons.
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