CBSE Class 11 Biology Body Fluids and Circulation MCQs Set E

Question. Which term does not apply to human heart?
a) Pacemaker
b) Neurogenic
c) Mitral valve
d) Four chambered
Answer: b

Question. Rh factor is responsible for
a) Turner syndrome
b) AIDS
c) Erythroblastosis foetalis
d) Sickle cell anaemia
Answer: c

Question. Pulmonary artery arises from
a) left ventricle
b) right atrium
c) left atrium
d) right ventricle
Answer: d

Question. Which of the following blood groups is universal donor and acceptor respectively?
a) AB, O
b) AB, A
c) O, AB
d) A, AB
Answer: c

Question. QRS complex represents
a) Repolarisation of ventricles
b) Depolarisation of atria
c) Repolarisation of atria
d) Depolarisation of ventricles
Answer: d

Question. ‘Bundle of His’ is a part of which one of the following organs in humans?
a) Kidney
b) Brain
c) Heart
d) Pancreas
Answer: c

Question. In erythroblastosis foetalis, which of the following factors passes through placenta into foetus?
a) ABO antibodies
b) Rh antibodies
c) Rh antigens
d) Agglutinins
Answer: b

Question. Which of the following is expected if husband is Rh⁺ and wife is Rh⁻?
a) No problem in any pregnancy
b) No problem with 1st pregnancy
c) Problem would be expected in future pregnancy
d) Both (b) and (c)
Answer: d

Question. T-wave represents
a) Depolarisation of atria
b) Repolarisation of atria
c) Depolarisation of ventricles
d) Repolarisation of ventricle
Answer: d

Question. In an open circulatory system
a) There is no heart
b) There is no distinction between blood and tissue fluid
c) There is no need of blood vessels
d) There are no open spaces or sinuses
Answer: b

Question. Open circulatory system is found in
a) Annelids and arthropods
b) Fishes and molluscs
c) Arthropods and mollusc
d) Annelids and chordates
Answer: c

Question. Which of the following statement is wrong about lymph?
a) Lymph is an important carrier for nutrients and hormones
b) Fats are absorbed through lacteals present in intestinal villi
c) The fluid present in lymphatic system is called lymph
d) Lymph is colourful as it has haemoglobin but no RBC
Answer: d

Question. Contraction of the ventricle in the heart begins by the command from
a) AV node
b) Purkinje fibres
c) SA node
d) chordae tendinae
Answer: c

Question. Bicuspid valve allows blood from
a) right auricle to right ventricle
b) left auricle to left ventricle
c) post caval to heart
d) right auricle to left ventricle
Answer: b

Question. A four-chambered heart is found in
a) humans only
b) mammals only
c) all vertebrates
d) some reptiles, all birds and mammals
Answer: d

Question. What is the correct order of events in blood clotting?
A. Conversion of fibrinogen to fibrin
B. Clot retraction and leakage of serum
C. Thromboplastin formation
D. Conversion of prothrombin to thrombin
a) C, B, A, D
b) D, A, C, B
c) C, D, A, B
d) C, D, B, A
Answer: c

Question. A blockage in aortic valve would directly reduce blood flow to the
a) brain
b) heart
c) lungs
d) liver
Answer: c

Question. In arteriosclerosis
a) blood coagulates even in the arteries.
b) arterial walls become inelastic and thickened.
c) sex linked heredity is involved.
d) arterial walls become very thin and weak so that blood oozes out.
Answer: b

Question. In adult man, normal BP is
a) 100/80 mm Hg
b) 80/120 mm Hg
c) 120/80 mm Hg
d) 100/120 mm Hg
Answer: c

Question. Coronary artery disease (CAD) is often referred to as
a) angina
b) cardiac arrest
c) heart failure
d) atherosclerosis
Answer: d

Question. The heart sound ‘dupp’ is produced when
a) tricuspid valve is opened
b) mitral valve is opened
c) mitral valve is closed
d) semilunar valves at the base of aorta get closed
Answer: d

Question. Closure of which of the following valves makes louder sound of heart beat?
a) Mitral valve
b) Tricuspid valve
c) Semilunar valve
d) Auriculo-ventricular valve
Answer: d

Question. The pattern of contraction and relaxation of the heart is referred to as
a) arterial flow
b) blood pressure
c) cardiac cycle
d) blood flow
Answer: c

Question. QRS is related to
a) auricular relaxation
b) ventricular contraction
c) auricular contraction
d) cardiac cycle
Answer: b

Question. Which structures are directly involved in the pulmonary circulation?
a) Right atrium, aorta and left ventricle
b) Superior vena cava, right atrium and left ventricle
c) Left ventricle, aorta and inferior vena cava
d) Right ventricle, pulmonary arteries and left atrium
Answer: d

Question. Which of the following carries oxygenated blood?
a) Hepatic vein
b) Renal vein
c) Pulmonary vein
d) Hepatic portal vein
Answer: c 

Statement Type Questions

Question. Which of the following statement best defines artery?
a) It carries oxygenated blood to the different organs.
b) It carries blood away from the heart to different organs.
c) It carries blood from one visceral organ to another visceral organ.
d) It breaks up into capillaries which reunite to form a vein.
Answer: b

Question. Which of the following statements is correct regarding joint diastole?
a) Both ventricles relax but atria contract.
b) Both semilunar valves are open.
c) Tricuspid and bicuspid valves are open.
d) Both atria relax but ventricles contract.
Answer: c

Question. Which one of the statement is correct with reference to the circulation of blood in a mammal?
a) Pulmonary artery carries oxygenated blood to the lungs.
b) Blood from the lungs is returned to heart through 2-veins, one from each lung.
c) None of the above.
d) Left auricle receives oxygenated blood.
Answer: d 

Critical Thinking Type Questions 

Question. Maximum amount of oxygen is lost from the blood in the
a) arteries of the body
b) capillaries surrounding the alveoli
c) left auricle of the heart
d) capillaries surrounding the tissue cells
Answer: d

Question. Which is the correct route through which pulse making impulse travels in the heart?
a) AV node → SA node → Purkinje fibres → Bundle of His → heart muscles
b) SA node → Purkinje fibres → Bundle of His → AV node → heart muscles
c) SA node → AV node → Bundle of His → Purkinje fibres
d) AV node → Bundle of His → SA node → Purkinje fibres → heart muscles
Answer: c

Question. First heart sound (LUBB) coincides with which wave of ECG?
a) Q-wave
b) R-wave
c) T-wave
d) P-wave
Answer: b

Question. If due to some injury, the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?
a) The ‘pacemaker’ will stop working.
b) The flow of blood into the aorta will be slowed down.
c) The blood will tend to flow back into the left atrium.
d) The flow of blood into the pulmonary artery will be reduced.
Answer: d

Question. Which one of the following will be the cardiac output (in litres per minute) of a heart that has a stroke volume of 0.07 litres and is beating at a rate of 90 per minute?
a) 06.30
b) 63.00
c) 63.30
d) 0.63
Answer: d 

Assertion/Reason Type Questions

In the following questions, a statement of Assertion is followed by a statement of Reason.
(a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
(b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.

Question. Assertion : SAN is called the pacemaker of heart.
Reason : The SAN can generate the maximum number of action potentials and is responsible for initiating and maintaining the rhythmic contractile activity of the heart.
Answer: a

Question. Assertion : Saline water is not given to patients with hypertension.
Reason: Saline water can cause vomiting and may drop blood pressure suddenly causing cardiac arrest.
Answer: c 

Question. Assertion: WBCs accumulate at the site of wounds by diapedesis.
Reason: It is squeezing of leucocytes from endothelium.
Answer: b

Question. Assertion : Prothrombinase enzyme acts as antiheparin.
Reason : Heparin prevents coagulation of blood in blood vessels.
Answer: b