Mark 'T' if the statement is true and 'F' if it is false:
(i) During heavy exercise the breathing rate of a person slows down. (T/F)
(ii) Plants carry out photosynthesis only during the day and respiration only at night. (T/F)
(ii) Frogs breathe through their skins as well as their lungs. (T/F)
(iv) The fishes have lungs for respiration. (T/F)
(v) The size of the chest cavity increases during inhalation. (T/F)
Correct Answer:
(i) During heavy exercise, a person's breathing rate slows down. False
(ii) Plants carry out photosynthesis only during the day and respiration only at night. False
(iii) Frogs breathe through their skins as well as their lungs. True
(iv) The fishes have lungs for respiration. False
(v) The size of the chest cavity increases during inhalation. True.
Explanation:
During heavy exercise, a person's breathing rate increases.
Anaerobic respiration takes place in human muscles during vigorous physical exercise. Our body needs more energy during exercise, and aerobic respiration is not sufficient to provide energy. Hence muscles start anaerobic respiration to meet the extra energy needed by the body.
During both day and night, the plants and trees perform the process of respiration where they absorb oxygen and releases carbon dioxide.
The plants perform photosynthesis only during the daytime when trees absorb carbon dioxide and release oxygen gas.
Fish, being the living organism, requires to breathe in oxygen and expel carbon dioxide to survive. Instead of lungs like humans, fish possess gills.
Gills are the branching organs located on the sides of fish heads with very minute blood vessels known as capillaries. Fishes breathe in the oxygen contained in water through gills.]
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