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BIOLOGY [3 marks Question Answer]

Respiratory System · ICSE STD 9 (ICSE - English Medium). 2 questions.

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[3 marks Question Answer]

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Question 13 Marks
Look at the given diagram and answer the following questions.
Image
(i) Label the parts (1) to (4).
(ii) Give the aim of the experiment for which this set-up is used.
(iii) Name the human respiratory organs symbolized by (1), (2) and (3) in the given set-up.
Answer
(i) 1 tube, 2-baloon 3 Bell Jar 4. rubber sheet.
(ii) mechanism of breathing.
(iii) 1-Trachea, 2-Lungs, 3-diaphragm
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Question 23 Marks
The diagram given below represents an experimental setup for demonstrating certain aspects of the air breathed in/out. The two valves C and D help to regulate the direction of the flow of air.
Image
Answer the following questions:
(i) There are mistakes at two places in the diagram. Redraw the diagram correctly to eliminate these mistakes.
(ii) What is the aim of the experiment?
(iii) Name the liquid contained in the test tube A and the liquid in test tube B.
(iv) what would be the observations after performing the experiment?
Answer
(i) refer fig 16.6 of page number 156 on you text book.
(ii) CO2 is given out in respiration.
(iii) Lime water
(iv) Expired air contain more CO2 than inspired.
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[3 marks Question Answer] - BIOLOGY STD 9 Questions - Vidyadip