Breathing And Exchange Of Gases Test

Breathing And Exchange Of Gases

This is Breathing And Exchange Of Gases Test-02 for CBSE class 11 Biology.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
After a forceful expiration :
  • A
    lungs becomes empty so exchange stops for a while
  • B
    gaseous exchange is interrupted
  • C
    gaseous exchange continues uninterrupted
    Correct
  • D
    diaphragm and intercostals increase respiratory surface area
2
What is the difference between the two given diagrams :
Question 2 figure 1
  • A
    1-healthy alveoli,2- alveoli of emphysema patient
    Correct
  • B
    1- alveoli of bronchitis patient, 2- alveoli of asthma patient
  • C
    1- alveoli of pneumoconiosis patient, 2- healthy alveoli
  • D
    1- alveoli of asthma patient, 2- alveoli of pneumoconiosis patient
3
First step in the process of inspiration is :
  • A
    relaxation of sternum
  • B
    relaxation of diaphragm
  • C
    contraction of diaphragm
    Correct
  • D
    increase in volume of thoracic cavity
4
The gaseous exchange portion of the human respiratory tract include/s :
  • A
    alveoli, bronchioles and trachea
  • B
    alveoli and alveolar ducts
    Correct
  • C
    alveoli, bronchioles, trachea and nasal chambers
  • D
    alveoli and bronchioles
5
Air breathing animals lose a large amount of precious water from their respiratory surface through :
  • A
    Evaporation
    Correct
  • B
    Diffusion
  • C
    none of these
  • D
    Secretion
6
Which of the following pair of factors are consideredfavourable for the formation of oxyhaemoglobin? low \(pC{O_2}\) & low temperature low \(pC{O_2}\) & low \({H^ + }\) concentration low \({H^ + }\) concentration & high \(pC{O_2}\) High \({H^ + }\) concentration & high \(pC{O_2}\) In the alveoli, where there is high \(pC{O_2}\) , low \(pC{O_2}\) , lesser \({H^ + }\) concentration and lower temperature, the factors areall favourable for the formation of oxyhaemoglobin.
  • A
    low \(pC{O_2}\) & low temperature
    Correct
  • B
    High \({H^ + }\) concentration & high \(p{O_2}\)
  • C
    low \({H^ + }\) concentration & high \(pC{O_2}\)
  • D
    low \(p{O_2}\) & low \({H^ + }\) concentration
7
Read the following statements : i. Pressure contributed by and individual gas in a mixture of gases is called its partial pressure ii. \(pC{O_2}\) in alveolar air is 45 mm Hg and in venous blood is 40 mm Hg.
  • A
    both are wrong
  • B
    Statement i) is correct and ii) is wrong.
    Correct
  • C
    Statement i) is wrong and ii) is correct.
  • D
    both are correct
8
The principle of exchange of gases at the lungs is :
  • A
    both diffusion and filtration
  • B
    Diffusion
    Correct
  • C
    Conditioning and facilitated transport
  • D
    Filtration
9
Read the following statements : i. The affinity of Hb for CO is 200 to 250 times more than its affinity for oxygen therefore CO competes with oxygen for binding to Hb. ii. The result of this binding are a shift of oxygen-hemoglobin dissociation curve to the left and its alteration to a more hyperbolic shape.
  • A
    Statement i) is wrong and ii) is correct
  • B
    both are correct
    Correct
  • C
    both are wrong
  • D
    Statement i) is correct and ii) is wrong
10
Expiration will take place when there is :
  • A
    positive intrapulmonary pressure
    Correct
  • B
    negative intrapulmonary pressure
  • C
    both B & C
  • D
    less pressure within lungs as compared to atmospheric pressure
11
RBCs and muscle cells carry out anaerobic respiration, but : i. RBCs are permanently anaerobic and muscle cells are temporarily anaerobic ii. RBCs are temporarily anaerobic and muscle cells are permanently anaerobic iii. Muscle cells lack mitochondria.
  • A
    only statement ii) is correct.
  • B
    only statement i) is correct.
    Correct
  • C
    None of the statements are correct.
  • D
    only statement ii) and iii) are correct.
12
Water breathing is more problematic than air breathing because : i. water is 800 times more dense and hence holds much more oxygen than air does. ii. since oxygen dissolved in water diffuses far more slowly than air therefore large quantity of water is required to be passed over the gills.
  • A
    statementi) is wrong and ii) is correct.
    Correct
  • B
    both statements are wrong.
  • C
    both statements are correct.
  • D
    statement ii) is wrong and i) is correct.
13
Read the following about blood pigments : i. Hemoglobin is the pigment present in our blood and is iron containing protein. ii. Haemocyanin is the pigment present in blood of Palaemon and is copper containing protein. iii. Haemocyanin is much more efficient than haemoglobin.
  • A
    all statements are correct.
  • B
    only statement ii) and iii) are correct.
  • C
    only statement i) and ii) are correct.
    Correct
  • D
    only statement i) is correct.
14
The given graph shows \( {O_2}\) consumption and ventilation during exercise so we can infer from this graph : i. During exercise, oxygen consumption rate in our body increases. ii. Neural stimulus allows abdominal muscles , which are a kind of smooth muscle to contract to facilitate ventilation while exercising. iii. Increase in ventilation during exercise prevents large changes in the partial pressure of \( {O_2}\) or \( C{O_2}\) iv. The overall impact is breathing rate increases.
Question 14 figure 1
  • A
    onlyi) and iii) are correct.
  • B
    only i),iii) and iv) are correct.
    Correct
  • C
    all the above statements are correct.
  • D
    onlyi) and ii) are correct.
15
The exchange of gases in : i. the alveoli that lowers the \( p{O_2}\) of blood and raises its \( pC{O_2}\) is external respiration ii. the tissues that lowers the \( pC{O_2}\) of blood and raises its \( p{O_2}\) is internal respiration
  • A
    statementi) is wrong and ii) is correct.
  • B
    both statements are wrong.
    Correct
  • C
    both statements are correct.
  • D
    statement ii) is wrong and i) is correct.