Question

Q.1. With the help of a schematic flowchart, show the break down of glucose in a cell to provide energy:
(i) in the presence of oxygen
(ii) in the absence of oxygen
(iii) when there is lack of oxygen.

Q.2. Draw a diagram of human respiratory system and label the following:
(i) part where air is filtered by fine hair and mucus.
(ii) part which terminates in balloon-like structures.
(iii) balloon-like structures where exchange of gases takes place.
(iv) part which separates chest cavity from abdominal cavity.

Q.3. a.) How does the transport of materials in xylene and phlegm occurs?
b.)What is translocation?

Q.4. a.) Draw a diagram of cross-section of the human heart and label the following parts:
i.)right ventricle
ii.)aorta
iii.)Left atrium
iv.)pulmonary artseries
b.) Give reasons for the following:
i.) the muscular walls of ventricles are thicker than the walls of atria
ii.) arteries have thick elastic walls​

Answer 1

Answer:

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Answer 2

Answer:

1) i) in the presence of oxygen