Pneumotaxic centre is present in –
Breathing and Exchange of Gases , Quiz 3

Quiz
•
Biology
•
11th Grade
•
Hard
Brainzyme Edutech
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12 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Pons
Medulla oblongata
Cerebrum
Cerebellum
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The largest proportion of CO2 carried by blood is in the form of –
Molecular CO2 dissolved in the plasma
Bicarbonates (HCO3– ) carried within RBCs
HCO3– carried in the plasma
Molecular CO2 chemically bound to haemoglobin
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The breathing centre initiates ventilation in response to –
A decrease in air pressure
A decrease in O2
An increase in CO2
The rate of gas exchange in the alveoli
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
All of the following factors play role in the regulation of respiratory rhythm except –
CO2
H+ conc.
O2
None of the above is correct
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The respiratory disorder which leads to irreversible distension and loss of elasticity of alveoli of lungs is
bronchitis
bronchial asthma
emphysema
SARS.
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
A disease characterised by accumulation of fluid with dead WBCs occupying most of the air space in alveolar sac is
Pneumonia
Bronchitis
Emphysema
Bronchial asthma
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because :-
There is a positive intrapleural pressure
Pressure in the lungs is higher than the atomospheric pressure.
There is a negative pressure in the lungs.
There is a negative intrapleural pressure pulling at the lung walls.
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