The cardiac cycle in normal subject is about
0.5 s
0.8 s
1.0 s
1.2 s
B.
0.8 s
Cardiac cycle is the sequence of events that occurs in the heart during one full heart beat. These events comprise contraction (systole) and relaxation (diastole) of the chambers of the heart, associated with opening and closing of the heart valves. At a resting heart rate, the human cardiac cycle lasts approximately 0.85 second, ie, 0.8 seconds.
Which of the following statements is related to Starling's law of heart?
Greater the stroke volume greater is the heart rate
Greater the initial length of the cardiac muscle fibre, more is the force of contraction of hear
Greater the minute volume, greater is the heart rate
Lesser the length of cardiac muscle fibre greater is the force of contraction of heart
The difference between systolic and diastolic pressure in human is
120 mm Hg
80 mm Hg
40 mm Hg
200 mm Hg
Red cell count is carried out by
haemocytometer
haemoglobinometer
sphygmomanometer
electrocardiogram
The blood does not clot inside the body because of
oxygenation of blood
movement of blood
heparin in blood
absence of fibrinogen in blood
