(MCQ) IAS PRE GS Online Coaching : General Science - "The Respiratory System"
Sample Material of Our Online Coaching Programme
(MCQ) General Science: The Respiratory System
1. Consider the following statements.
(i) Sponges & Jelly fish lack specialised organ
for gas exchange, so they take gases directly from water.
(ii) Flatworms & annelid use thin wall blood
vessels known as capillaries.
(iii) Earthworms use their outer surfaces to
exchange gas.
Which of the above are correct?
- i only
- ii & iii only
- i & iii only
- iii only
2. Consider the following statements.
(i) Frogs eliminate carbon dioxide 2.5 times as
fast through their skin.
(ii) Eels obtain 60% of their oxygen through
their skin.
(iii) Humans exchange only 1% of CO2 through
their skin.
Which of the above are correct?
- i & ii only
- ii & iii only
- i, ii & iii
- None
3. Consider the following statements.
(i) In mammals breathing takes place through
diaphragm.
(ii) Abdominal cavity contains viscera.
(iii) Thoracic cavity contains heart & lungs.
Which of the above are correct?
- i & ii only
- ii & iii only
- i, ii & iii
- iii only
4. Consider the following statements.
(i) During respiration the external intercostals
muscles contract, lifting the ribe up & out.
(ii) We breathe 15-18 times a minute exchanging
about 500 ml of air.
(iii) An average male adult can flush his lungs
with 4 litre of air at each breath. This is called vital capacity.
Which of the above are false?
- i, iii only
- ii, iii only
- None of the above
- i & ii only