The volume of air expired forcefully after forceful inspiration

  • TV+ IRV

  • TV+ERV+IRV

  • TV+ERV+IRV+RV

  • None of these

The partial pressure of CO2 is minimum in the

  • atmospheric air

  • Alveoli

  • Deoxygenated blood

  • Oxygenated blood

Diffusion membrane consists of

  • Squamous epithelium of alveoli

  • endothelium of alveolar capillaries

  • Basement substance between them

  • All of the above

What percentage of Carbon dioxide is transported by RBCs

  • 7

  • 20-25

  • 70

  • 97

What percentage of Carbon dioxide is transported in a dissolved state through plasma

  • 7

  • 20-25

  • 70

  • 97

What percentage of oxygen molecule is transported in a dissolved state through plasma

  • 3

  • 20-25

  • 70

  • 97

Which of the following is true for transport of gases

  • Maximum amount of O2 is transported by RBCs

  • Maximum amount of CO2 is transported by Plasma as Bicarbonates

  • Plasma transports both CO2 and O2

  • All of the above

Which of the following is a true statement?

  • Oxygen binding with HB is a reversible process

  • Oxygen binding with HB is an irreversible process

  • Hb is not a protein

  • It’s not a pigment

The binding of Hb with oxygen forms

  • Methamoglobin

  • Carbhaminohaemoglobin

  • Oxyhaemoglobin

  • Carbaminohaemoglobin

Each Hb can carry a maximum of ___oxygen molecules.

  • 2

  • 4

  • 8

  • 6

Binding of Oxygen with Hb is primarily related to

  • Partial pressure of O2

  • Partial pressure of CO2

  • Hydrogen ion Concentration

  • Temperature

A curve obtained when percentage saturation of Hb with O2 is plotted against the pO2 is also called as

  • Association curve

  • Dissociation Curve

  • Sigmoid Curve

  • Both 2 and 3

Which of the following factors are favourable for the shifting of the Oxyhaemoglobin dissociation Curve to the right side

  • High pO2

  • Low pCO2

  • less H+ Concentration

  • None of these

More binding of CO2 occurs when pCO2 is _____ and pO2 is ____

  • high, high

  • low, high

  • high, low

  • low, low

pCO2 is high and pO2 is low can be found in

  • alveoli

  • tissues

  • blood

  • heart

In alveoli,

  • pCO2 is high and pO2is low

  • pCO2 is low and pO2 is high

  • pCO2 is low and pO2 low

  • None of the above

The formation of Carbonic acid from Carbon dioxide and water has catalyzed the enzyme

  • Carbonic anhydrase

  • Carbonic anhydride

  • Carbonic hydrase

  • Both A and C

At tissue sites, partial pressure of CO2­ is high due to _______ process.

  • Anabolic

  • catabolic

  • Both A and B

  • Oxidative

Carbonic anhydrase is present in

  • R.B.C

  • Plasma

  • Both A and B

  • Tissues

The chloride ions diffuse into the erythrocytes to maintain the electrochemical neutrality, this phenomenon is called

  • Hamburger Phenomenon

  • Chloride Shift

  • Haldane effect

  • Both A and B

Which of the following helps in the regulation of the respiratory rhythm?

  • Respiratory rhythm centre

  • Pneumotaxic centre

  • Aortic arch and carotid artery receptors

  • All of the above

The respiratory centre is highly sensitive for

  • CO2­

  • O2­

  • H+ ions

  • Both A and C

Aortic arch and carotid artery receptors cannot recognise changes in

  • CO2­ Concentration

  • O2­ Concentration

  • H+ ions Concentration

  • All of these

Pneumotaxic Centre is present in the

  • forebrain

  • midbrain

  • Hindbrain

  • Diencephalon

Which of the following is not true about hering breuer reflex

  • It is activated when a normal mechanism to switch off inspiration does not work timely due to any reason.

  • It is activated when a normal mechanism to switch off expiration does not work timely due to any reason

  • It prevents the alveoli from overstretching and bursting

  • It normally remains inactive

Difficulty in breathing due to inflammation  of bronchi and bronchioles leads to

  • Asthma

  • Emphysema

  • Occupational Lung Disease

  • Rhinitis

Which of the following disease is caused mainly due to cigarette smoking

  • Asthma

  • Emphysema

  • Bronchitis

  • Rhinitis

Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                              Column II
(respiratory volume)              (value)
I. TV                                    1. 2500 mL - 3000 mL
II. IRV                                 2. 500 mL
III. ERV                               3. 1100 mL - 1200 mL
IV. RV                                  4. 1000 mL - 1100 mL 
Codes:
I II III IV
  • D. 1 2 4 3

  • C. 2 1 3 4
  • A. 1 2 3 4
  • B. 2 1 4 3

In the given diagram of the oxygen dissociation curve, under normal physiological conditions, the partial pressure of oxygen at the tissue level is represented by:
  • A
  • B
  • C
  • D

According to Bohr's effect

  •   Hemoglobin oxygen binding affinity is inversely related to acidity.

  •   Hemoglobin oxygen binding affinity is inversely related to concentration of CO2.

  •   Hemoglobin oxygen binding affinity is directly related to acidity.

  •   Both 1 and 2.

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Practice Zoology Quiz Questions and Answers