During respiration, the exchange of gases takes place in:(a) bronchi (b) alveoli (c) bronchioles (d) trachea

Academic Biology NCERT Class 10

(b) alveoli

Alveoli are the tiny air sacs at the end of the small bronchioles, where the exchange of gases takes place.

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Updated on: 24-Mar-2023

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Which of the following is the correct sequence of air passage during inhalation?(a) nostrils ----> larynx ----> pharynx ---->trachea ----> lungs(b) nasal passage ----> trachea ----> pharynx ----> larynx ----> alveoli(c) larynx ----> nostrils ----> pharynx ----> lungs(d) nostrils ----> pharynx ----> larynx ----> trachea ----> alveoli
Name the pores in a leaf through which respiratory exchange of gases takes place.
Which of the following statements are true about respiration?(i) during inhalation, ribs move inwards and diaphragm is raised.(ii) the gaseous exchange takes place in the alveoli.(iii) haemoglobin has greater affinity for carbon dioxide than oxygen.(iv) alveoli increase surface area for the exchange of gases(a) (i) and (iv) (b) (ii) and (iii) (c) (i) and (iii) (d) (ii) and (iv)
Name the areas in a woody stem through which respiratory exchange of gases takes place.
How are the alveoli designed to maximise the exchange of gases?
(a)Give the main points of difference between respiration in plants and respiration in animals.(b) Describe the exchange of gases which takes place in the leaves of a plant (a) during daytime, and (b) at night.(c) Which contains more carbon dioxide : exhaled air or inhaled air ? Why ?
Fill in the following blanks with suitable words:(a) The organs of respiration in man are the ______.(b) The actual exchange of gases takes place in the _____ of the lungs.(c) ______ in the lungs provide a very large surface area for gaseous exchange.(d) Yeast undergoes ______ respiration whereas Amoeba undergoes _____ respiration.(e) Gills are the breathing organs in _____.
In a double displacement reaction such as the reaction between sodium sulphate solution and barium chloride solution :(A) exchange of atoms takes place (B) exchange of ions takes place(C) a precipitate is produced (D) an insoluble salt is producedThe correct option is : (a) (B) and (D) (b) (A) and (C) (c) only (B) (d) (B), (C) and (D)
In one of the following organisms, the gaseous exchange during respiration does not take place through cell membrane/skin. This organism is:(a) Electric eel (b) Leech (c) Earthworm (d) Amoeba
State whether the following statements are true or false:(a) During respiration, the plants take CO2 and release O2.(b) Energy can be produced in cells without oxygen.(c) Fish and earthworm exchange gases during respiration in the same way.
How does gaseous exchange takes place in earthworms?
The breathing and respiration in woody stem of a plant takes place through:(a) root hair (b) lenticels (c) closed stomata (d) open stomata
Anaerobic process(A) takes place in yeast during fermentation.(B) takes place in the presence of oxygen.(C) produces only energy in the muscles of human beings.(D) produces ethanol, oxygen and energy.
What type of respiration takes place in human muscles during vigorous physical exercise? Give reason for your answer.
(a)Explain how, the air we breathe in gets cleaned while passing through the nasal passage.(b) Why do the walls of trachea not collapse when there is less air in it ?(c) How are oxygen and carbon dioxide exchanged in our body during respiration?(d) How are lungs designed in human beings to maximise the exchange of gases?

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