Cardiovascular Review Flashcards
1
Q
Which of the following prevents backflow into the right atria when the right ventricle contracts? A. Tricuspid valve B. Mitral valve C. Bicuspid valve D. Aortic semilunar valve E. Pulmonary semilunar valve
A
A
2
Q
Which of the following structures allow action potential to be transferred between cardiomyocytes? A. Desmosomes B. Nuclei C. Gap junction D. Mitochondria E. Striations
A
C
3
Q
The normal pacemaker of the heart is the A. sinoatrial (SA) node B. AV node C. bundle of His D. ventricles. E. Purkinje fibres
A
A
4
Q
In the ECG, The QRS complex represents A. Opening of Atrioventricular valve B. Atrial depolarisation C. Ventricular repolarisation D. Ventricular depolarisation E. Closing of semilunar valve
A
D
5
Q
Which of the following will cause a decrease in contractility? A. Adrenalin B. Thyroxine C. Glucagon D. Epinephrine E. Acidosis
A
E
6
Q
Sympathetic stimulation of auto rhythmic cells will cause A. Increase in potassium efflux B. Decrease in calcium influx C. Increase rate of depolarisation D. Hyperpolarizes the cell E. Decreases heart rate
A
C
7
Q
Hydrostatic pressure
A. Forces fluid out of capillaries
B. Pulls fluid into capillaries
C. is greater than colloid pressure at the arterial end
D. is greater than colloid pressure at the venous end
E. A and C
A
E
8
Q
Which of the following provide sites of variable resistance? A. Arterioles B. Arteries C. Veins D. Venules E. Capillaries
A
A
9
Q
If baroreceptors in the aorta detected low blood pressure, which of the following will result? A. Vasoconstriction B. Vasodilation C. Decrease in stroke volume D. Decrease in heart rate E. No change in cardiac output
A
A
10
Q
Mean arterial is calculated by A. dBP+ (1/3 x PP) B. sBP+ ( 1/3 xPP) C. sBP-dBP D. 1/3 (sBP+dBP) E. sBPx dBP
A
A
