71. Cartilage of santorini is a band in

A Cricoid
B Arytenoid
C Thyroid
D None of the above
Answer :   Arytenoid
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72. Dissociation of oxyhaemoglobin occurs in tissues due to

A High PO2
B Low PO2
C Equal PO2
D Irrespective of PO2
Answer :   Low PO2
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73. Each lung is enclosed in a double membrance called as pleura. The membrance which closely covers the lung is

A Lung pleura
B Visceral pleure
C Peritoneal pleura
D Parietal pleura
Answer :   Visceral pleure
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74. Number of tracheal rings in man is

A 16-20
B 20-24
C 24-28
D 28-32
Answer :   16-20
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75. The most important function of diaphragm of mammals is

A To devide the body cavity into compartments
B To protect lungs
C To aid in respiration
D To aid in ventilation
Answer :   To aid in ventilation
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76. The majority of carbon dioxide produced by our body cells is transported to the lungs

A as bicarbonates
B as carbonates
C attached to hemoglobin
D dissolved in the blood
Answer :   as bicarbonates
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77. Common feature of human and insect trachea is

A Noncollapsible wall
B Supporting rings
C Ectodermal origin
D Endodermal origin
Answer :   Supporting rings
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78. The maximum volume of air a person can breathe in after a forced expiration is known as :

A Total lung capacity
B Expiratory capacity
C Vital capacity
D Inspiratory capacity
Answer :   Vital capacity
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79. Approximately seventy percent of carbon- dioxide absorbed by the blood will be transported to the lungs:

A as bicarbonate ions
B in the form of dissolved gas molecules
C by binding to R.B.C
D as carbamino - haemoglobin
Answer :   as bicarbonate ions
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80. The combination of oxygen with haemoglobin is called

A Oxidation
B Oxygenation
C Reduction
D None of the above
Answer :   Oxygenation
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