Cardiovascular System

Multiple Choice

Name the event that happens at part labelled 1.

• Pacemaker potential

• Depolarization

• Repolarization

• Hyperpolarization

Multiple Choice

Which of the following values represents the firing rate of SA node?

• 70-80 Ap/min

• 50-60 AP/min

• 40-60 AP/min

• 20-40 AP/min

Multiple Choice

Name the phase that happens at part labelled 1?

• Depolarization

• Mild repolarization

• Plateau

• Repolarization

Multiple Choice

The phase labelled 2 is because of which of the following ?

• Influx of sodium ions

• Efflux of potassium

• Influx of calcium ions

• sodium-potassium ATPAse

Multiple Choice

Which of the following events produces the first heart sound ?

• Opening of Av valves

• Closing of AV valves

• Opening of Semilunar valves

• Closing of semilunar valves

Multiple Select

Second heart sound is heard clearly at which areas of the heart? Mark all that applies.

• Aortic area

• Tricuspid area

• Mitral area

• Pulmonary area

Multiple Choice

The 'P' wave in an ECG represents which of the following events ?

• ventricular repolarization

• atrial repolarization

• ventricular depolarization

• atrial depolarization

Multiple Choice

Which of the following values represents the stroke volume in a normal adult ?

• 50 ml

• 60 ml

• 70 ml

• 80 ml

Multiple Select

which of the following may cause congestive heart failure ? Select all that apply.

• Coronary atherosclerosis

• Low blood pressure

• myocardial infarcts

• Bradycardia

Multiple Choice

Which of the following is responsible for the plateau phase in ventricular action potential ?

• Influx of sodium

• Influx of Potassium

• Influx of magnesium

• Influx of calcium