Mitral valve in mammals guards the opening between:
  • Right atrium and right ventricle
  • Left atrium and left ventricle
  • Right atrium and ventricle
  • Left atrium and right ventricle
Tricuspid valve is present between
  • Right atrium and right ventricle
  • The two atria
  • The two ventricles
  • Left atrium and left ventricle
Which of the following has the thickest walls?
  • Right ventricle
  • Left ventricle
  • Right auricle
  • Left auricle
The pacemaker of heart is
  • AV node
  • SA node
  • SV node
  • Tricuspid valve
Contraction of right ventricle pumps blood into
  • Dorsal aorta
  • Pulmonary artery
  • Pulmonary vein
  • Coronary artery
The impulse of heartbeat originates from
  • SA node
  • Vagus nerve
  • AV node
  • Cardiac nerve
The heart of a healthy man beats normally per minute
  • 85-90 times
  • 80-90 times
  • 70-80 times
  • 60-70 times
Systole causes
  • Entry of blood into lungs
  • Entry of blood into heart
  • Exit of blood from heart
  • Exit of blood from ventricles
Typical ‘lubb-dupp’ sounds heard during heartbeat are due to
  • Closing of bicuspid and tricuspid valves
  • Closing of semilunar valves
  • Blood under pressure through aorta
  • Closure of bicuspid-tricuspid valves followed by semilunar valves
The instrument used to hear sound is;
  • Electrocardiograph
  • Sphygmomanometer
  • Stethoscope
  • Haemometer
In adult man, normal BP is:
  • 100/80 mm Hg
  • 120/80 mm Hg
  • 100/120 mm Hg
  • 80/120 mm Hg
The instrument by which BP of man is determined:
  • Ultrasound
  • BP meter
  • Stethoscope
  • Sphygmomanometer
William Harvey is known for discovery of
  • Blood circulation
  • Blood clotting
  • Respiration
  • Digestion
Mammals are said to have double circulation, it means
  • Blood vessels are paired
  • There are two types of blood vessels attached to every organ
  • There are two systems, one from the heart to the lungs and back to the rest of the body
  • The blood circulates twice through the heart
In mammals, veins differs from arteries in having
  • Thicker walls
  • Deeply present
  • Carry blood away from heart
  • internal valves
Oxygenated blood returns from lungs to the heat through
  • Coronary vein
  • Pulmonary vein
  • Coronary vein
  • Pulmonary artery
How many molecules of \(\text{C}_2\) can associate with a molecule of hemoglobin in man?
  • One
  • Two
  • Three
  • Four
Hemoglobin is having maximum affinity with
  • $\text{NH}_3$
  • $\text{O}_2$
  • $\text{CO}$
  • $\text{CO}_2$
In Which from $CO_2$ is carried by blood
  • Sodium bicarbonate
  • Sodium carbonate
  • Potassium carbonate
  • Magnesium carbonate
Amount of oxygen which is transported by one gram hemoglobin is
  • 20 ml
  • 13.4 ml
  • 1.34 ml
  • None of these
Mountain sickness result due to
  • Anemic hypoxia
  • Arterial hypoxia
  • Lack of sufficient Hb
  • Lack of sufficient RBCs
Heart with single circulation is found in
  • Mammals land birds
  • Reptiles
  • Fishes and amphibians
  • Fishes only
The blood pressure is measured by
  • Electrocardiogram (ECG)
  • Stethoscope
  • Sphygmomanometer
  • Pulse rate
Chemical basis of action of herve on heart beat was discovered by
  • Otto Loewi
  • Pavlov
  • Harvey
  • Landsteiner
Erythrocytes of adult rabbit and other mammals are formed in
  • Kidney
  • Liver
  • Spleen
  • Bone marrow
The blood vascular of mammals is known as the double vascular system because
  • A group of veins carry oxygenated blood and other group conducts deoxygenated blood
  • Oxygenated blood runs from heart to different organs by one set of veins, while deoxygenated blood runs from heart to lungs by another set
  • Two different blood runs never meet
  • All of these
Which of the following is helpful for erythropoietin
  • $\text{Fe}^{++}$
  • $\text{Mg}^{++}$
  • $\text{Ca}^{++}$
  • $\text{Cu}^{++}$
Heart beat originates from
  • Left atrium
  • Right ventricle
  • Pacemaker
  • Cardiac muscles
Cardiac cycle in man takes about
  • 0.5 seconds
  • 1.0 seconds
  • 1.2 seconds
  • 0.8 seconds
Where are red blood cells formed?
  • Spleen
  • Liver
  • Redbone marrow of short bones
  • Thyroid
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