Breathing and Exchange of gases Set 1

All India Pre Medical Test (AIPMT)

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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Breathing and Exchange of gases Set 1

Q1 | The length of human trachea is about (Gujarat C.E.T.Q.B.)
  • 6 inches
  • 12 cm
  • 12 inches
  • 18 cm
Answer: 12 cm
Q2 | The trachea is supported by, cartilaginous rings,which are.........shaped
  • C
  • L
  • O
  • S
Answer: C
Q3 | Sound production in humans is controlled by
  • Nares
  • Lungs
  • Larynx
  • Pharynx
Answer: Larynx
Q4 | A lung contains many small balloon like air sacs. are called.....
  • Gas spaces
  • Alveoli
  • Bronchi
  • Bronchioles
Answer: Alveoli
Q5 | The intake of air is called ?
  • Venitlation
  • Inhalation
  • Exhalation
  • Respiration.
Answer: Inhalation
Q6 | Intercostal muscles regulate the movement of
  • Ribs
  • Trachea
  • Diapharagm
  • Pharynx.
Answer: Ribs
Q7 | The muscles present between ribs are called
  • Phrenic muscles
  • Intercoslal muscles
  • Cardiac muscles
  • Voluntary muscles.
Answer: Intercoslal muscles
Q8 | During exhalation, the diaphragm moves
  • Apart
  • Downwards
  • Upwards
  • Inwards
Answer: Upwards
Q9 | Respiratory control centres are loacted in
  • Lungs
  • Medulla oblongata
  • Spinal cord
  • Ribs
Answer: Medulla oblongata
Q10 | The de-oxygenated blood from heart comes to the lungs by
  • Pulmonary artery
  • Pulmonary vein
  • Branchial artery
  • Renal artery
Answer: Pulmonary artery
Q11 | Oxygen containing blood transported from lungs is to heart by
  • Pulmonary artery
  • Pulmonary vein
  • Branchial artery
  • Renal vein
Answer: Pulmonary vein
Q12 | How much fraction of oxygen is transported to tissues through RBCs?
  • 100%
  • 56%
  • 45%
  • 97%.
Answer: 97%.
Q13 | H2 CO3 is converted into CO2 and H2O with the help of an enzyme known as
  • Carboxylase
  • Carbonic dehydrogenase
  • Carbonicenhydrase
  • Carbonic anhydrase.
Answer: Carbonic anhydrase.
Q14 | The metal ion present in haemoglobin is
  • Iron
  • Magnesium
  • Copper
  • Zinc
Answer: Iron
Q15 | One RBC can transport about how many molecles of oxygen?
  • One million
  • Ten million
  • One billion
  • Ten billion
Answer: One billion
Q16 | How many percentage of CO2 transport in the form of carbamino compounds ?
  • 70%
  • 90%
  • 5%
  • 20%
Answer: 20%
Q17 | The largest amount of CO2 is transported in blood as
  • Carbamino compounds
  • Bicarbonates
  • Carbonic acid -
  • Carbonate ions.
Answer: Bicarbonates
Q18 | Chloride back-shift is associated with the transport of
  • Carbamino
  • CO2
  • Oxygen
  • Water
Answer: Oxygen
Q19 | CO2 reacts with water to form
  • Haemoglobinic acid
  • Carbonic acid
  • Bicarbonate ions
  • Carbon mono oxide.
Answer: Carbonic acid
Q20 | Bronchitis is a
  • Bacterial infection
  • Viral infection
  • Protozoan infection
  • Fungal infection.
Answer: Bacterial infection
Q21 | Asthma is a disease of
  • Pharynx
  • Trachea and its branches
  • Lungs
  • Blood capillaries
Answer: Trachea and its branches
Q22 | Flattening of alveolar ducts (tracheal vessels) results in
  • Asthma
  • Emphysema
  • Lung cancer
  • Bronchitis.
Answer: Emphysema
Q23 | Which of these protects the larynx
  • Pharnx
  • Trachea
  • Epiglottis
  • Naso-pharynx.
Answer: Epiglottis
Q24 | Trachea terminates in
  • Bronchi
  • Alveoli
  • Bronchioles
  • Nares
Answer: Bronchi
Q25 | In which form CO2 is not transported by blood plasma
  • NaHCO3
  • KHCO3
  • Carbamino proteins
  • KHbO2
Answer: KHCO3
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