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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Body fluids and Circulation Set 2

Q1 | Pace maker is
  • Instrument for measuring heart beat
  • Instrument for measuring pulse rate
  • Auriculo - ventricular node that provides impulse for heart beat
  • Sino - auricular node that provides impulse for heartbeat
Q2 | Which has the thickest walls ?
  • Left ventricle
  • Right ventricle
  • Left auricle
  • Right auricle
Q3 | Prothrombin required for blood clotting is produced in
  • Stomach
  • Liver
  • Spleen
  • Pancreas
Q4 | Contraction of right ventricle pumps blood into
  • Dorsal aorta
  • Pulmonary artery
  • Pulmonary vein
  • Coronary artery
Q5 | Dub sound is produced during closure of
  • Semilunar valves
  • Bicuspid valve
  • Tricuspid valve
  • Both a & b
Q6 | In circulatory system, valves occur in
  • Heart and blood vessels of both vertebrates and invertebrates
  • Both vertebrate and invertebrate hearts
  • Vertebrate heart only
  • Invertebrate heart only
Q7 | In blood
  • WBCs are more than RBCs
  • RBCs are more than WBCs
  • RBCs are less than platelets
  • Platelets are less than WBCs
Q8 | Pericardial fluid is secreted by
  • Myocardium
  • Parietal peritoneum
  • Visceral peritoneum
  • None of the above
Q9 | Pulse pressure is
  • Diastolic pressure
  • Systolic pressure
  • Difference between b and a
  • Pressure in great veins
Q10 | Which one are granulocytes
  • Neutrophils, basophils, lymphocytes
  • Eosinophils, basophils, monocytes
  • Basophils, monocytes, lymphocytes
  • Neutrophils, eosinophils, basophils
Q11 | Lymph consists of
  • RBCs, WBCs and plasma
  • RBCs, proteins and platelets
  • Alll components of blood except RBCs and some proteins
  • WBCs and serum
Q12 | Find the matching pair :
  • Lubb- sharp closure of AV valves at beginning of ventricular systole
  • Dub - sudden opening of semilunar valves at the beginning of ventricular systole
  • Pulsation of radial artery valves in blood vessels
  • Initiation of heart beat - Purkinje fibers
Q13 | Valves which allow blood from ventricles into arteries and not in opposite direction are
  • Aortic valve and mitral valve
  • AV valves and semilunar valves
  • Bicuspid and tricuspid valves
  • Semilunar valves and tricuspid valve
Q14 | Bundle of His is a network of
  • Muscle fibres distributed throughout heart walls
  • Muscle fibres found only in ventricle wall
  • Nerve fibres distributed in ventricles
  • Nerve fibres found throughout the heart
Q15 | Artificial pacemaker is usually implanted to correct the defect in
  • AV node
  • SA node
  • Purkinje fibers
  • Mitral valve
Q16 | Pulmonary vein carries oxygenated blood from
  • Heart to its walls
  • Heart to lungs
  • Lungs to heart
  • Heart to all body parts
Q17 | The sequence of cardiac cycle is
  • Atrial systole - ventricular systole - joint diastole
  • Atrial diastole - Atrial systole - ventricular diastole
  • Atrial systole - ventricular diastole - ventricular systole
  • ventricular diastole - ventricular systole - Atrial systole
Q18 | The blood returning to the heart from lungs via pulmonary vein has more
  • RBC per ml of blood
  • Haemoglobin per ml of blood
  • Oxygen per ml of blood
  • Nutrient per ml of blood
Q19 | Systemic heart refers to
  • The two ventricles together in humans
  • The heart that contracts under stimulation from nervous system
  • Left auricle and left ventricle in higher ventebrates
  • Entire heart in lower vertebrates
Q20 | In the heart of mammals the bicuspid valve is situated between
  • Left auricle and left ventricle
  • Post caval and right caval
  • Right auricle and left auricle
  • Right ventricle and pulmonary aorta
Q21 | The auriculo ventricular node in human heart was discovered by
  • Hiss
  • Lewis
  • Ringer
  • William Harvey
Q22 | The beating of heart of man is heard on the left side because
  • The left ventricle is toward the left side
  • Both the ventricles are towards the left side
  • Entire heart is on the left side
  • The aorta is on the left side
Q23 | Purkinje’s fibres are special types of
  • Muscle fibres located in heart
  • Nerve fibres located in cerebrum
  • Connective tissue fibers joining one bone to another bone
  • Sensory fibers extending from retina into optic nerve
Q24 | The pericardium and the pericardial fluid help in
  • Protecting the heart from friction, shocks and keeps it moist
  • Pumping the blood
  • Receiving the blood from various parts of the body
  • None of the above
Q25 | For reaching left side of heart, blood must pass through
  • Liver
  • Kidneys
  • Lungs
  • Brain