#8 Biology Class 12 Chapter 8 - Respiration and Circulation MHTCET / NEET MCQ
8 - Respiration and Circulation
(1) The muscular structure that separates the thoracic and abdominal cavity is .......... .
(a) pleura
(b) diaphragm
(c) trachea
(d) epithelium
Answer-
(b) diaphragm
(2) What is the minimum number of plasma membrane that oxygen has to diffuse across to pass from air in the alveolus to haemoglobin inside a R.B.C. ?
(a) two
(b) three
(c) four
(d) five
Answer-
(a) two
(3) .......... is a sound producing organ.
(a) Larynx
(b) Pharynx
(c) Tonsils
(d) Trachea
Answer-
(a) Larynx
(4) The maximum volume of gas that is inhaled during breathing in addition to T.V. is .......... .
(a) residual volume
(b) IRV
(c) GRV.
(d) vital capacity
Answer-
(b) IRV
(5) .......... muscles contract when the external intercostals muscles contract.
(a) Internal abdominal
(b) Jaw
(c) Muscles in bronchial walls
(d) Diaphragm
Answer-
(d) Diaphragm
(6) Movement of cytoplasm in unicellular organisms is called .......... .
(a) diffusion
(b) cyclosis
(c) circulation
(d) thrombosis
Answer-
(b) cyclosis
(7) Which of the following animals do not have closed circulation ?
(a) Earthworm
(b) Rabbit
(c) Butterfly
(d) Shark
Answer-
(c) Butterfly
(8) Diapedesis is performed by .......... .
(a) erythrocytes
(b) thrombocytes
(c) adipocytes
(d) leucocytes
Answer-
(d) leucocytes
(9) P acemaker of heart is .......... .
(a) SA node
(b) AV node
(c) His bundle
(d) Purkinje fibers
Answer-
(a) SA node
(10) Which of the following is without nucleus ?
(a) Red blood corpuscle
(b) Neutrophil
(c) Basophil
(d) Lymphocyte
Answer-
(a) Red blood corpuscle
(11) Cockroach shows which kind of circulatory system ?
(a) Open
(b) Closed
(c) Lymphatic
(d) Double
Answer-
(a) Open
(12) Diapedesis can be seen in .......... .
(a) RBC
(b) WBC
(c) Platelet
(d) neuron
Answer-
(b) WBC
(13) Opening of inferior vena cava is guarded by .......... .
(a) bicuspid valve
(b) tricuspid valve
(c) Eustachian valve
(d) Thebesian valve
Answer-
(c) Eustachian valve
(14) .......... wave in ECG represent atrial depolarization.
(a) P
(b) QRS complex
(c) Q
(d) T
Answer-
(a) P
(15) The fluid seen in the intercellular spaces in Human is .......... .
(a) blood
(b) lymph
(c) interstitial fluid
(d) water
Answer-
(b) lymph
(16) T he nasal cavity is divided into right and left nasal chambers by a .......... .
(a) sphenoid
(b) palatine
(c) mesethmoid
(d) zygomatic
Answer-
(c) mesethmoid
(17) The right lung is divided into .......... .
(a) 3 lobes
(b) 2 lobes
(c) 4 lobes
(d) 6 lobes
Answer-
(a) 3 lobes
(18) Carbon dioxide is carried in the blood mainly as .......... .
(a) sodium carbonate
(b) sodium bicarbonate
(c) carbaminohaemoglobin
(d) carbonic acid
Answer-
(b) sodium bicarbonate
(19) Transport of oxygen is carried out by .......... .
(a) plasma
(b) lungs
(c) RBCs
(d) nostrils
Answer-
(c) RBCs
(20) Respiration taking place at the alveoli of lungs is called .......... .
(a) internal respiration
(b) external respiration
(c) cellular respiration
(d) tissue respiration
Answer-
(b) external respiration
(21) T he volume of air inspired or expired during normal breathing is .......... .
(a) ERV
(b) IRV
(c) TV
(d) VC
Answer-
(c) TV
(22) What is the partial pressure of oxygen and carbon dioxide respectively in the atmospheric air ?
(a) PPO 2 159 mm Hg, PPCO2 0.3 mm Hg
(b) PPO 2 104 mm Hg, PPCO2 40 mm Hg
(c) PPO 2 40 mm Hg, PPCO2 45 mm Hg
(d) PPO 2 95 mm Hg, PPCO2 40 mm Hg
Answer-
(b) PPO 2 104 mm Hg, PPCO2 40 mm Hg
(23) The vital capacity of human lung is equal to .......... .
(a) 3500 ml
(b) 4600 ml
(c) 500 ml
(d) 1200 ml
Answer-
(b) 4600 ml
(24) The exchange of gases between alveolar air and alveolar capillaries occurs by .......... .
(a) osmosis
(b) active transport
(c) absorption
(d) diffusion
Answer-
(d) diffusion
(25) Oxygen dissociation curve will shift to right on the decrease of .......... .
(a) acidity
(b) carbon dioxide concentration
(c) temperature
(d) pH
Answer-
(d) pH
(26) Respiratory organs in scorpion are .......... .
(a) gills
(b) book lungs
(c) skin
(d) book gills
Answer-
(b) book lungs
(27) Breakdown of alveoli of lungs resulting in reducing surface area for gas exchange is known as .......... .
(a) emphysema
(b) sneezing
(c) pneumonia
(d) tuberculosis
Answer-
(a) emphysema
(28) D uring inspiration, the diaphragm .......... .
(a) relaxes
(b) contracts
(c) expands
(d) shows no change
Answer-
(b) contracts
(29) Over inflation of the lungs is prevented due to .......... .
(a) Bohr’s effect
(b) Conditioned reflex
(c) Hering-Breuer reflex
(d) Haldane effect
Answer-
(c) Hering-Breuer reflex
(30) Which of the following prevents collapsing of trachea ?
(a) Muscles
(b) Diaphragm
(c) Ribs
(d) Cartilaginous rings
Answer-
(d) cartilaginous rings
(31) Which one of the following produces antibodies ?
(a) Monocytes
(b) Erythrocytes
(c) Lymphocytes
(d) Monocytes
Answer-
(c) L ymphocytes
(32) P lasma protein which initiate blood coagulation is .......... .
(a) prothrombin
(b) fibrinogen
(c) thrombin
(d) fibrin
Answer-
(a) prothrombin
(33) The covering of heart is .......... .
(a) perichondrium
(b) pericardium
(c) periosteum
(d) peritoneum
Answer-
(b) pericardium
(34) Left atrioventricular aperture is guarded by .......... .
(a) tricuspid valve
(b) Eustachian valve
(c) bicuspid valve
(d) semilunar valve
Answer-
(c) bicuspid valve
(35) The pulmonary trunk and systemic aorta are joined by .......... .
(a) chordae tendinae
(b) columnae carnae
(c) ligamentum arteriosum
(d) Purkinje fibres
Answer-
(c) ligamentum arteriosum
(36) A trioventricular node is located in .......... .
(a) left atrium
(b) right atrium
(c) left ventricle
(d) right ventricle
Answer-
(b) right atrium
(37) .......... is most commonly used to feel pulse.
(a) Radial vein
(b) Brachial artery
(c) Brachial vein
(d) Radial artery
Answer-
(d) Radial artery
(38) QRS is related to .......... .
(a) atrial contraction
(b) ventricular contraction
(c) atrial relaxation
(d) ventricular relaxation
Answer-
(b) ventricular contraction
(39) Blood is a fluid connective tissue derived from .......... .
(a) ectoderm
(b) mesoderm
(c) endoderm
(d) epithelium
Answer-
(b) mesoderm
(40) What is the increase in number of RBCs called ?
(a) Erythropoiesis
(b) Polycythaemia
(c) Erythrocytopenia
(d) Erythroblastosis
Answer-
(b) Polycythaemia
(41) What is the increase in the number of WBCs called ?
(a) Leucopoiesis
(b) Leukopenia
(c) Leucocytosis
(d) Leukaemia
Answer-
(c) Leucocytosis
(42) In which of the following diseases there is uncontrolled increase in number of WBCs ?
(a) Leucopoiesis
(b) Leukopenia
(c) Leucocytosis
(d) Leukaemia
Answer-
(d) Leukaemia
(43) What is the decrease in the number of WBCs called ?
(a) Leucopoiesis
(b) Leukopenia
(c) Leucocytosis
(d) Leukaemia
Answer-
(b) Leukopenia
(44) Which is the correct arrangement of types of WBCs with respect to their number in blood ?
(Consider Neutrophil = N, Eosinophil = E, Basophil = B, Monocyte = M and Lymphocyte = L)
(a) NLMEB
(b) BEMLN
(c) NEBLM
(d) MEBLN
Answer-
(a) NLMEB
(45) Which is the correct order in which the proteins participate in clotting of blood ?
(a) Prothrombinase -> Prothrombin -> Thromboplastin ->Thrombin
(b) Thromboplastin -> Prothrombinase -> Prothrombin -> Thrombin
(c) Prothrombin -> Thromboplastin -> Thrombin -> Prothrombinase
(d) Thrombin -> Prothrombin -> Thromboplastin -> Prothrombinase
Answer-
(b) Thromboplastin -> Prothrombinase -> Prothrombin -> Thrombin
(46) Decrease in platelet count is called .......... .
(a) thrombocytopenia
(b) thrombocytosis
(c) thrombokinase
(d) thromboplastin
Answer-
(a) thrombocytopenia
(47) A trioventricular groove is also called a .......... .
(a) foramen ovale
(b) ligamentum arteriosum
(c) coronary sulcus
(d) ductus arteriosus
Answer-
(c) coronary sulcus
(48) The coronary sinus opens into the .......... .
(a) left atrium
(b) right atrium
(c) left ventricle
(d) right ventricle
Answer-
(b) right atrium
(49) Name the valve from the following that guards the opening of inferior vena cava.
(a) Tricuspid valve
(b) Semilunar valve
(c) Eustachian valve
(d) Thebesian valve
Answer-
(c) Eustachian valve
(50) Name the valve from the following guarding the opening of coronary sinus .......... .
(a) Thebesian valve
(b) Eustachian valve
(c) Tricuspid valve
(d) Semilunar valve
Answer-
(a) Thebesian valve
(51) What is an oval aperture in the interatrial septum of the foetus called ?
(a) Fossa ovalis
(b) Foramen ovalis
(c) L igamentum arteriosum
(d) D uctus arteriosus
Answer-
(b) Foramen ovalis
(52) What is the meaning of stroke volume ?
(a) Amount of blood in the body
(b) Pressure of contraction of heart
(c) Amount of blood put out of the ventricles in one minute
(d) Amount of blood put out of the ventricles in one beat
Answer-
(d) Amount of blood put out of the ventricles in one beat
(53) How much amount of blood is put out of the heart during one minute ?
(a) Equal to cardiac output
(b) Equal to stroke volume
(c) Equal to half of blood volume
(d) Equal to quarter of blood volume
Answer-
(a) Equal to cardiac output
(54) What is the time taken for one cardiac cycleof normal human being ?
(a) 0.1 second
(b) 0.3 second
(c) 0.4 second
(d) 0.8 second
Answer-
(d) 0.8 second
(55) Deposition of fatty substances in the lining of arteries results in .......... .
(a) arteriosclerosis
(b) atherosclerosis
(c) hyperglycemia
(d) hypotension
Answer-
(b) atherosclerosis
(56) Largest number of white blood corpuscles are .......... .
(a) eosinophils
(b) basophils
(c) neutrophils
(d) monocytes
Answer-
(c) neutrophils
(57) Which of the following animal have openbcirculatory system ?
(a) Earthworm
(b) Cockroach
(c) Frog
(d) Rabbit
Answer-
(b) Cockroach
(58) Which of the following leucocytes have unlobed nucleus ?
(a) lymphocyte
(b) eosinophils
(c) neutrophils
(d) basophils
Answer-
(a) lymphocyte
(59) Carbonic anhydrase is found in .......... .
(a) WBC
(b) RBCs
(c) thrombocytes
(d) blood plasma
Answer-
(b) RBCs
(60) The typical Lubb – D up sounds heard in the heart of a healthy person are due to .......... .
(a) closing of cuspid valves followed by the closing of the semilunar valves
(b) closing of semilunar valves
(c) closing of tricuspid valves
(d) closing of bicuspid valves
Answer-
(a) closing of cuspid valves followed by the closing of the semilunar valves
