Breathing and Exchange of Gases , Quiz 3

Breathing and Exchange of Gases , Quiz 3

11th Grade

12 Qs

quiz-placeholder

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Breathing and Exchange of Gases , Quiz 3

Breathing and Exchange of Gases , Quiz 3

Assessment

Quiz

Biology

11th Grade

Hard

Created by

Brainzyme Edutech

Used 152+ times

FREE Resource

12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Pneumotaxic centre is present in –

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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