Q.1
CO2 is transported ... ....
  • a) As carbonic acid
  • b) In carbaminohaemoglobin
  • c) As carbaminolaemoglobin and carbonic acid
  • d) dissolved in blood plasma
Q.2
A molecule of haemoglobin carries how many oxygen molecules
  • a) 1
  • b) 2
  • c) 3
  • d) 4
Q.3
Gases diffuse over the respiratory surface because of (Manipal 2002)
  • a) O2 is more in alveoli than in blood
  • b) O2 is more in blood than in tissues
  • c) CO2 is more in alveoli than in blood
  • d) PCO2 is more in blood than in tissues
Q.4
During inspiration ... ...
  • a) Diaphragm and internal intercostal muscles contract
  • b) Diaphragm and external intercostal muscles contract
  • c) Diaphragm and external muscles relax
  • d) Diaphragm and internal intercostal muscles relax
Q.5
Percenatage of oxygen being carried by blood plasma is ... ....
  • a) 6-9%
  • b) 3-6%
  • c) 2-3%
  • d) 1-2%
Q.6
At high altitude, RBCs of human blood will ... ....
  • a) Increase in number
  • b) Increase in size
  • c) Decrease in number
  • d) Decrease in size
Q.7
Vocal cords occur in
  • a) Bronchial tube
  • b) Larynx
  • c) Glottis
  • d) Pharynx
Q.8
Thoracic cage of man is formed of ... ...
  • a) Ribs and thoracic vertebrae.
  • b) Ribs and sternum
  • c) Ribs,sternum and lumbar vertebrae
  • d) Ribs,sternum and thoracic vertebrae
Q.9
Capacity of human lungs for air in a healthy person is (Orissa 2005)
  • a) 3000 ml
  • b) 1500 ml
  • c) 1000 ml
  • d) 500 ml
Q.10
Make the correct pairs.
Columan-I Column-II
(a) Tidal volume i. 1000 to 1100 ml
(b) Residual volume ii. 500 ml
(c) Expiratory reserve volume iii. 2500 to 3000 ml
(d) Inspiratory reserve volume iv. 1100 to 1200 ml
  • a) a = ii, b = iv, c = i, d = iii
  • b) a = iii, b = i, c = ii , d= iii
  • c) a = ii, b = iii, c = i, d = iv
  • d) a = ii, b = i, c = iii, d= iv
Q.11
In which disease lung tissue degenerate?
  • a) Pneumonia
  • b) Emphysema.
  • c) Asthma
  • d) Bronchitis
Q.12
During respiration......
  • a) O2 is produced and CO2 is consumed
  • b) O2 is consumed and CO2 is produced
  • c) Both O2 and CO2 are produced
  • d) Both O2 and CO2 are consumed.
Q.13
The muscles present between ribs are called
  • a) Intercoslal muscles
  • b) Phrenic muscles
  • c) Cardiac muscles
  • d) Voluntary muscles.
Q.14
Flattening of alveolar ducts (tracheal vessels) results in
  • a) Asthma
  • b) Emphysema
  • c) Lung cancer
  • d) Bronchitis.
Q.15
Blockage in respiratory passage in humans is prevented due to the presence of
  • a) Larynx
  • b) Epiglottis
  • c) ‘C’ shaped cartilagenous rings.
  • d) Alveoli
Q.16
Hamburger’s phenomenon is also known as .....
  • a) HCO3– shift
  • b) Na+ shift
  • c) H+ shift
  • d) Chloride shift
Q.17
Volume of air breathed in and out during effortless respiration is (Kerala 2001)
  • a) vital volume
  • b) residual volume
  • c) normal volume
  • d) tidal volume
Q.18
Hiccough (hiccup) is due to activity of ... ....
  • a) Intercostal muscles
  • b) Food in air tract
  • c) Diaphragm
  • d) Inadequate oxygen in environment
Q.19
SARS is caused by a variant of ... ...
  • a) Pneumococcus pneumonia
  • b) Common cold by Corona virus
  • c) Asthma
  • d) Bronchitis
Q.20
How much pulmonary air is expired normally (Har.P.M.T.2005)
  • a) 70%
  • b) 20%
  • c) 25%
  • d) 32%
Q.21
A respiratory surface must be ?
  • a) Thin
  • b) Moist
  • c) Wide spread
  • d) All these.
Q.22
Mountain sickness at high altitude is due to ... ....
  • a) Excess CO2 in blood
  • b) Decreased CO2 in air
  • c) Decreased partial pressure of oxygen
  • d) Decreased efficiency of haemoglobin
Q.23
Which of the following shows pulmonary respiration
  • a) Human
  • b) Coelentrate
  • c) Sponge
  • d) Fishes
Q.24
How much fraction of oxygen is transported to tissues through RBCs?
  • a) 100%
  • b) 97%.
  • c) 56%
  • d) 45%
Q.25
The left lung is slightly smaller so as
  • a) It is exception
  • b) No specific reason
  • c) Both A and B
  • d) To accommodate heart.
Q.26
What is role of buffer system in blood ?
  • a) To maintain pH of blood plasma
  • b) To maintain pH of blood
  • c) To maintain pH of RBC
  • d) To maintain pH of blood platelets
Q.27
Chloride shift is required for transport of ... ...
  • a) Nitrogen
  • b) Oxygen
  • c) Carbon dioxide
  • d) Carbon dixide and oxygen
Q.28
Carbon dioxide is transported from tissues to respiratory surface by only(C.B.S.E.1993)
  • a) Plasma and erythrocytcs
  • b) Plasma
  • c) Erythrocytes
  • d) Erythrocytes and leucocytes.
Q.29
A lung contains many small balloon like air sacs. are called.....
  • a) Gas spaces
  • b) Alveoli
  • c) Bronchi
  • d) Bronchioles
Q.30
Which one is not viral infection
  • a) Emphysema.
  • b) Bronchitis
  • c) Vocational lung disease
  • d) Asthma
Q.31
The human ribs
  • a) Are accessory respiratory organs
  • b) Do not help in breathing
  • c) Are main respiratory organs
  • d) Are not respiratory organs
Q.32
In expiration, diaphragm becomes ... ...
  • a) Arched
  • b) Flattened
  • c) Straightened
  • d) Relaxed
Q.33
Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is (C.B.S.E.1995)
  • a) Inefficient system of ventilation with little of residual air
  • b) Inefficient system of ventilation with high percentage of residual air
  • c) An efficient system of ventilation with no residual air
  • d) An efficient system of ventilation with little residual air.
Q.34
Dissociation curve of O2 (which is dissociation from Hb) shifts to the rights....
  • a) O2 concentration decrease
  • b) CO2 concentration decreases
  • c) CO2 concentration increase
  • d) Chloride concentration increases
Q.35
The centre which excites both the activities during rapid breathing is
  • a) Ventral respiratory center
  • b) Lateral respiratory center
  • c) Dorsal respiratory center.
  • d) Pneumotoxic center
Q.36
At higher CO2 condtcentration,oxygen dissociation curve of haemoglobin will (CPMT.1990)
  • a) Become irregular
  • b) Move to left
  • c) Become regular
  • d) Move to right
Q.37
Maximum amount 70-75% of carbon dioxide transport occurs as
  • a) Carbaminohaemoglobin complex
  • b) Bicarbonate
  • c) Dissolved in plasma
  • d) None of the above
Q.38
Haemoglobin is (CB.S.E.1999)
  • a) Blood carrier
  • b) Vitamin
  • c) Skin pigment
  • d) Respiratoy pigment
Q.39
CO2 reacts with water to form
  • a) Carbonic acid
  • b) Carbon mono oxide.
  • c) Haemoglobinic acid
  • d) Bicarbonate ions
Q.40
CO2 from RBC enters blood plasma in the form of
  • a) H2CO3
  • b) HCO3–
  • c) KHCO3
  • d) NaHCO3
Q.41
The length of human trachea is about .....
  • a) 6 inches
  • b) 12 cm
  • c) 12 inches
  • d) 18 cm
Q.42
Blood transports oxygen in the form of
  • a) HHbO2
  • b) KHCO3
  • c) KHbO2
  • d) H2CO3
Q.43
Volume of air remaining in lungs after: maximum respiratory effort is
  • a) Tidal volume
  • b) Vital capacity
  • c) Total lung capacity
  • d) Residual volume
Q.44
A higher CO2 concentration of blood causes .. ...
  • a) Slow diffusion of CO2 from blood
  • b) Slow transport of CO2 from blood
  • c) Slow diffusion of O2 from blood
  • d) Both A and B
Q.45
They respire through lungs
  • a) Crocodiles
  • b) Fish
  • c) Earthworms
  • d) Cockroaches
Q.46
The metal ion present in haemoglobin is
  • a) Iron
  • b) Magnesium
  • c) Copper
  • d) Zinc
Q.47
During normal breathing the ventral respiratory center
  • a) Maintian rhythmicity of respiration
  • b) Does not play significant role
  • c) Excites both inhalation and exhalation
  • d) Regulate breathing
Q.48
Respiratory control centres are loacted in
  • a) Ribs
  • b) Spinal cord
  • c) Medulla oblongata
  • d) Lungs
Q.49
Sound production in humans is controlled by
  • a) Pharynx
  • b) Larynx
  • c) Nares
  • d) Lungs
Q.50
Trachea terminates in
  • a) Nares
  • b) Alveoli
  • c) Bronchioles
  • d) Bronchi
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