Breathing and Exchange of gases Set 3

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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Breathing and Exchange of gases Set 3

Q1 | Where Bicarbonate is conveted into carbonic acid
  • In the RBC of capillaries around the lungs
  • In the body fluid
  • In the areolar cavity of lungs
  • In the RBC of blood capillaries around body tissue.
Q2 | Maximum amount of O2 is transported in humans by
  • RBC
  • WBC
  • Blood platelets
  • Blood plasma
Q3 | CO2 from RBC enters blood plasma in the form of
  • H2CO3
  • HCO3–
  • KHCO3
  • NaHCO3
Q4 | The human ribs
  • Are accessory respiratory organs
  • Do not help in breathing
  • Are main respiratory organs
  • Are not respiratory organs
Q5 | Respiration rate is the lowest during.
  • Running
  • Playing
  • Eating
  • Sleeping
Q6 | Hamburger’s phenomenon is also known as(CPMT.1988,1991,AMU.2001,J.LPME.R.2002)
  • HCO3– shift
  • Na+ shift
  • H+ shift
  • Chloride shift
Q7 | Oxygen carrying capacity of blood is (CPMT.1990)
  • 20%
  • 30%
  • 40%
  • 50%
Q8 | Respiratory movements are controlled by (A.P.M.E.E.1978,C.P.M.T.1998)
  • Cerebelluam
  • Cerebrum
  • Medulla oblongata
  • Crura cerebri
Q9 | At higher CO2 condtcentration,oxygen dissociation curve of haemoglobin will (CPMT.1990)
  • Move to left
  • Move to right
  • Become irregular
  • Move upwardly
Q10 | Chloride shift is required for transport of (CPMT.1990)
  • Nitrogen
  • Oxygen
  • Carbon dioxide
  • Carbon dixide and oxygen
Q11 | Volume of air inspired or expired with each normal breath is known as(CMPT.1992,AMU.2000)
  • Inspiratory capacity
  • Total Lung capacity
  • Tidal volume
  • Residual volume
Q12 | Oxygen haemoglobin dissociation curve will shift to right on decrease of (AMU.1992)
  • Acidity
  • Carbon dioxide concentration
  • Temperature
  • pH
Q13 | Is Double membrane pleard sac is situated...... (J.K.C.M.E.E.1992)
  • Envelops the kidneys
  • Envelops the brain
  • Envelops the lungs
  • Lines the nasal passage
Q14 | In expiration, diaphragm becomes (C.P.M.T.1993)
  • Flattened
  • Relaxed
  • Straightened
  • Arched
Q15 | Carbon dioxide is transported from tissues to respiratory surface by only(C.B.S.E.1993)
  • Plasma and erythrocytcs
  • Plasma
  • Erythrocytes
  • Erythrocytes and leucocytes.
Q16 | Respiratory centre is situated in CPMT.1980,2002,B.H.U.1995,M.P.P.M.T.1998,C.B.S.E.1999,R.PMT.2006)
  • Cerebellum
  • Medulla oblongata
  • Hypothalamus
  • Cerebrum
Q17 | Which is false ? (Manipal 1995)
  • Blood from right side of heart is carried to lungs by pulmonary artery
  • Pleura is double covering of kindey
  • Pancreas is both exocrine & endocrine gland
  • Scurvy is due to vitamin C deficiency.
Q18 | Volume of air breathed in and out during effortless respiration is (Kerala 2001)
  • residual volume
  • vital volume
  • tidal volume
  • normal volume
Q19 | Body tissue obtain oxygen from haemoglobin due to its dissociation in tissues caused by (M.P.PMT.1995)
  • Low oxygen concentration and high carbon dioxide concentration
  • Low oxygen concentration
  • Low carbon dioxide concentration
  • High carbon dioxide concentration.
Q20 | Lungs have a number of alveoli for (M.P.PMT.1995)
  • Having spongy texture and proper shape
  • More surface area for diffusion of gases
  • More space for increasing volume of inspired air
  • More nerve supply.
Q21 | Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is (C.B.S.E.1995)
  • Inefficient system of ventilation with little of residual air
  • Inefficient system of ventilation with high percentage of residual air
  • An efficient system of ventilation with no residual air
  • An efficient system of ventilation with little residual air.
Q22 | During transport of CO2 blood does not become acidic due to (C.B.S.E.1995)
  • Neutralisation of H2 CO3 by Na2 CO3
  • Absorption by leucocytes
  • Blood buffers
  • Non accumulation
Q23 | At high altitude,RBCs of human blood will (C.B.S.E.1995,Pb.PMT.1999,J.LPM.E.R.2000)
  • Increase in number
  • Decrease in number
  • Decrease in size
  • Increase in size
Q24 | CO2 is transported (C.B.S.E.1095)
  • dissolved in blood plasma
  • As carbonic acid
  • In carbaminohaemoglobin
  • As carbaminolaemoglobin and carbonic acid
Q25 | Maximum amount 70-75% of carbon dioxide transport occurs as (R.P.M.T.1996,1998,Kamataka 1997,M.P.PMT.1998,C.P.M.T.1998,B.V.2002)
  • Dissolved in plasma
  • Carbaminohaemoglobin complex
  • Bicarbonate
  • None of the above