Tag: heart beat
Questions Related to heart beat
The duration of cardiac cycle is
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0.8 sec
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0.8 $\mu $ sec
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0.08 sec
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0.008 sec
The cardiac cycle consists of a period of relaxation called diastole, during which the heart fills with blood, followed by a period of contraction called systole. The total duration of the cardiac cycle, including systole and diastole, is the reciprocal of the heart rate. For example, if heart rate is 72 beats/min, the duration of the cardiac cycle is 1/72 beats/min about 0.0139 minutes per beat, or 0.833 second per beat.
Each heart beat generates how many pulse in the arteries
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Two
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Three
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One
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Five
This sequential event in the heart which is cyclically repeated is called the cardiac cycle. Each cardiac cycle consists of systole and diastole of both the atria and ventricles. Each cardiac cycle represents one heartbeat. The number of heart beats per minute in resting person is called as normal heart rate. The normal heart rate is about 72 beats per minute. The heart rate is same as pulse rate because the contractions of the heart cause an increase in blood pressure in arteries that leads to noticeable pulse. Hence each heartbeat generates one pulse in the arteries.
The volume of blood each ventricle pumps out during a cardiac cycle is about
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70 ml
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5000 ml
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71 ml
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1200 ml
The cardiac output of a normal adult healthy person at rest is almost 5 litres. The volume of blood pumped out of the left ventricle in one beat is called the stroke volume. It is 70 ml.
When we are at rest what will happen to the heart beat?
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Increase
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Decrease
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Remain same
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Firsts decrease and then increase
The second heart sound (dubb) is associated with the closure of
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Tricuspid valve
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Semilunar valves
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Bicuspid valve
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Tricuspid and bicuspid valves
'X' is the rhythmic contraction and relaxation in the aorta and its main arteries. What is X?
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Heart beat
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Heart rate
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Pulse
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Cardiac output
If the systolic pressure is $120$mm Hg and diastolic pressure is $80$mm Hg, the pulse pressure is $80$mm Hg, the pulse pressure is ______.
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$120\times80 = 9600$mm Hg
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$120+80 = 200$ mm Hg
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$120 - 80 = 40$mm Hg
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$\frac{120}{40} = 3$mm Hg
An adult human with average health has systolic and diastolic pressures as
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120 mm Hg and 80 mm Hg
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50 mm Hg and 80 mm Hg
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80 mm Hg and 80 mm Hg
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70 m Hg and 120 mm Hg
Blood pressure is the pressure against the walls of the blood vessels produced by the discharge of blood into them by contraction of the left ventricle.
Which one of the following is a matching pair?
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Lubb - sharp closure of AV valves at the beginning of ventricular systole
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Dub - sudden opening of semilunar valves at the beginning of ventricular diastole
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Pulsation of the radial artery - valves in the blood vessels
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Initiation of the heart beat - Purkinje fibres
The first heart sound is produced when
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Intraventricular pressure decreases
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Semilunar valve snaps shut
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Bicuspid and tricuspid close quickly
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Diastole begins
first heart sound is produced by the closing of the atrioventricular valves . The first heart sound, or S1, forms the "lub" of "lub-dub" and is composed of components M1 (mitral valve closure) and T1 (tricuspid valve closure). Normally M1 precedes T1 slightly. It is caused by the closure of the atrioventricular valves, i.e. tricuspid and mitral (bicuspid), at the beginning of ventricular contraction, or systole. So, the correct option is C.( Bicuspid and tricuspid close quickly )