Check this cardiovascular system

 Cardiovascular system 

 

Check your score:

1. This is the reason why the SA node acts as heart’s pacemaker

(a) because it has a poor cholinergic innervation

(b) because it has a rich sympathetic innervation

(c) because of its capability of generating impulses

(d) because it generates impulses at the highest rate

 

2. This about second heart sound is incorrect

(a) it is occasionally split

(b) it is due to the closure of semi-lunar valves

(c) indicates the commencement of diastole

(d) it has a longer duration than the first sound

3. The reason for the dicrotic notch on the aortic pressure curve is

(a) contraction of aorta

(b) closure of the aortic valve

(c) rapid filling of the left ventricle

(d) closure of the pulmonary valve

4. Rise in the carotid sinus pressure leads to

(a) reflex hypercritical

(b) reflex hyperplane

(c) reflex bradycardia

(d) reflex tachycardia

5. Peripheral vascular resistance can be best given by

(a) pulse pressure as it corresponds to aortic compliance and stroke volume

(b) mean arterial pressure as it supplies blood to organs

(c) diastolic blood pressure as it leads to the decrease till mid-thoracic aorta

(d) systolic pressure as it causes an increase in the descending aorta

6. Duration of the absolute period, i.e., when the whole of heart is in diastole is

(a) 0.2 seconds

(b) 0.1 seconds

(c) 0.4 seconds

(d) 0.7 seconds

7. This sets glomerular capillary pressure apart from other capillaries found in the body

(a) Lower filtration pressure

(b) Higher filtration pressure

(c) Both (a) and (b)

(d) none of these

8. The ventricular muscles accepts impulses directly from

(a) AV node

(b) Bundle of His

(c) Right and left bundle branches

(d) Purkinje system

9. This is the similarity between pulmonary and systemic circulation

(a) total capacity

(b) pulse pressure

(c) peripheral vascular resistance

(d) volume of the circulation per minute

10. On the heart, the impact of adrenaline is all of these except that

(a) it increases the uptake of oxygen by the heart

(b) it increases the contraction force

(c) it decreases the myocardial irritability

(d) it increases the heart rate 

answer:

1.d  2.d   3.b   4.c   5.c  6.a  7.b   8.d   9.d   10.c

THANK YOU!!!