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