81. Which of the following statements is related to starling’s law of heart
A. Greatar the stroke volume greater is the heart rate
B. Greater the intial length of the cardiac muscle fibre, more the force of contraction of heart
C. Greater the minute volume, greater is the heart rate
D. Lesser the length of cardiac musle fibre greater is the force of contraction of heart
Answer : Option B
82. An artificial pace - maker is implanted subcutaneously and connected to the heart in patients
A. Having 90 % blockage of the three main coronary arteries
B. Having a very high blood pressure
C. With irregularity in the heart rhythm
D. Suffering from arteriosclerosis
Answer : Option C
83. The pace - setter in the heart is called
84. Cardiac output is determined by
85. Which of the following blood vessles has wide lumen
A. Renal vein
B. Post venacava
C. Renal artery
D. Right pulmonary artery
Answer : Option B
86. In haemodialysis, patient’s blood is pumped from one of the arteries and mixing with X . Blood is purified and it is then pumped into vein of the patient after adding Y to it. X Y X Y
A. Heparin , Anti heparin
B. Prothrombin, Thrombin
C. antiheparin , Heparin
D. Prothrombin, Heparin
Answer : Option A
87. Wave ‘T’ is representing in ECG as :
A. Diastole of both atria and ventricles
B. Systole of right atria and left ventricle
C. Systole of the left atria and right ventricle
D. Systole of both atria and ventricles
Answer : Option A
88. Which one of the following vein breaks up into capillaries
89. Serotonin in the blood
A. Relaxes blood vessels
B. Prevents clotting of the blood
C. Helps in clotting of blood
D. Constricts blood vessels
Answer : Option D
90. The artery can be distinguished from the vein in having