01 Regarding the metabolic activity of the myocardiuma. Oxygen extraction from coronary arterial blood is higher than In other organs
b. Venous blood from the heart contains more lactate than venous blood from any other organ
c. Respiratory quotient of heart muscle under basal conditions is 1
d. Myocardium can use fatty acids for energy
e. Respiratory quotient of heart muscle may fall to 0.5
Answer
a.True
b.False
c.True
d.True
e.False
02 Left ventricle in a healthy person
a. Has the same cardiac output as the right over a period of time
b. Has a significantly higher pressure than right ventricle during isovolemitric contraction
c. Has in greater muscle mass than the right ventricle
d. Is mainly responsible for the apex beat
e. Has a higher maximum systolic pressure than the ventricle
Answer
a.True
b.True
c.True
d.True
e.True
03 In a young adult the right ventricular
a. Pressure never goes below zero
b. Pressure maximum during systole is 50 mmHg
c. Pressure in both systole an diastole is less than the plasma colloid osmotic pressure
d. Impact on the chest wall may be felt as the apex beat
e. Depolarization is seen in all the leads of the ECG as the R waves
Answer
a.True
b.False
c.False
d.False
e.False
04 In the cardiac cycle
a. Phase of isometric contraction begins when the aortic valve opens
b. Length of systole shortens with increased heart rate
c. Aortic pressure falls to its diastolic pressure during isometric ventricular relaxation
d. Phase of ventricular contraction approximately equal to the QT interval in ECG
e. Most of ventricular filling occur during atrial contraction
Answer
a.False
b.True
c.True
d.False
e.False
05 In the cardiac cycle
a. Right ventricular ejection begins few milliseconds before left ventricular ejection
b. Blood regurgitates into the venacva during atrial systole
c. Ventricular systole lasts longer than diastole
d. Aortic valve closure precedes pulmonary valve closure
e. All four cardiac valves remain open during ventricular systole
Answer
a.False
b.True
c.False
d.True
e.False
06 Ventricular systole
a. Begins with the isometric relaxation phase
b. Lasts about 0.5 s in healthy adults at rest
c. Lasts longer than atrial systole
d. Can coincide with atrial systole in complete heart block
e. Ends with the closure of the semi lunar valves
Answer
a.False
b.False
c.True
d.True
e.True
07 Isometric ventricular contraction
a. Begins when semilunar valves open
b. Ends when aortic and pulmonary valves open
c. Lasts for about 0.5 s
d. Is a phase where all four cardiac values closed
e. Causes a sharp increase in atrial pressure
Answer
a.False
b.False
c.False
d.True
e.True
08 At the end of the atrial diastole
a. Right 'ventricle is completely full
b. Left ventricle is completely empty
c. 'Left ventricular pressure is about 35 mmHg
d. Left atrial pressure is about 20 mmHg
e. Right ventricular pressure is about 10 mmHg
Answer
a.True
b.False
c.False
d.False
e.False
09 Commencement of the ventricular diastole coincides with
a. Opening of aortic valve
a. Atrial systole
b. isometric ventricular relaxation
c.Ventricular ejection
d.Isometric ventricular contraction
e. Atrial diastole
Answer
a.False
b.True
c.False
d.True
e.False
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For cardiac out put MCQs click here
a. Right ventricular ejection begins few milliseconds before left ventricular ejection
b. Blood regurgitates into the venacva during atrial systole
c. Ventricular systole lasts longer than diastole
d. Aortic valve closure precedes pulmonary valve closure
e. All four cardiac valves remain open during ventricular systole
Answer
a.False
b.True
c.False
d.True
e.False
06 Ventricular systole
a. Begins with the isometric relaxation phase
b. Lasts about 0.5 s in healthy adults at rest
c. Lasts longer than atrial systole
d. Can coincide with atrial systole in complete heart block
e. Ends with the closure of the semi lunar valves
Answer
a.False
b.False
c.True
d.True
e.True
07 Isometric ventricular contraction
a. Begins when semilunar valves open
b. Ends when aortic and pulmonary valves open
c. Lasts for about 0.5 s
d. Is a phase where all four cardiac values closed
e. Causes a sharp increase in atrial pressure
Answer
a.False
b.False
c.False
d.True
e.True
08 At the end of the atrial diastole
a. Right 'ventricle is completely full
b. Left ventricle is completely empty
c. 'Left ventricular pressure is about 35 mmHg
d. Left atrial pressure is about 20 mmHg
e. Right ventricular pressure is about 10 mmHg
Answer
a.True
b.False
c.False
d.False
e.False
09 Commencement of the ventricular diastole coincides with
a. Opening of aortic valve
b. Opening of mitral valve
c. End of isometric ventricular contraction
d. Closure of aortic valve
e. A sharp drop of ventricular pressure
Answer
a.False
b.False
c.False
d.True
e.True
10 Both atrioventricular valves , aortic pulnionary valve are all closed inc. End of isometric ventricular contraction
d. Closure of aortic valve
e. A sharp drop of ventricular pressure
Answer
a.False
b.False
c.False
d.True
e.True
a. Atrial systole
b. isometric ventricular relaxation
c.Ventricular ejection
d.Isometric ventricular contraction
e. Atrial diastole
Answer
a.False
b.True
c.False
d.True
e.False
For explanation Click here
For cardiac out put MCQs click here