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प्रश्न
Describe the exchange of gases which takes place in the leaves of a plant
(a) during daytime, and (b) at night.
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उत्तर
(a) During the daytime, the leaves use some of the oxygen produced through photosynthesis for respiration. For photosynthesis, the leaves not only use the carbon dioxide produced through respiration but some carbon dioxide is also taken in from the air. Thus, during the daytime, oxygen diffuses out and carbon dioxide diffuses in.
(b) At night, as photosynthesis does not takes place, oxygen is not produced. Thus, oxygen from the air diffuses into the leaves to carry out respiration. And carbon dioxide produced by respiration diffuses out into the air. So, at night, oxygen diffuses in and carbon dioxide diffuses out.
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संबंधित प्रश्न
How are oxygen and carbon dioxide transported in human beings?
Given below is a square of letters in which are hidden different words related to respiration in organisms. These words may be present in any direction − upwards, downwards, or along the diagonals. Find the words for your respiratory system. Clues about those words are given below the square.
- The air tubes of insects
- Skeletal structures surrounding chest cavity
- Muscular floor of chest cavity
- Tiny pores on the surface of leaf
- Small openings on the sides of the body of an insect
- The respiratory organs of human beings
- The openings through which we inhale
- An anaerobic organism
- An organism with tracheal system
If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring? Justify your answer.
What is the other name of wind-pipe?
In the lungs what substance is taken into the body?
Fill in the following blank with suitable word:
The organs of respiration in man are the _____________.
Explain why, a land plant may die if its roots remain waterlogged for a long time.
Explain how, it would benefit deep sea divers if humans also had gills.
What are the major organs of respiratory system in man (or humans)?
Which of the following is correct for the process of anaerobic respiration?
| Carbon dioxide always produced | A lot of energy released | |
| (a) | No | Yes |
| (b) | No | No |
| (c) | Yes | No |
| (d) | Yes | Yes |
Lack of oxygen in muscles often leads to cramps in the legs of sprinters. This is due to the conversion of pyruvate to:
In cockroaches, air enters the body through:
Air that enters through the nose passes into this tube.
The partial pressure of oxygen of blood in pulmonary capillaries is i ______ mrnHg while in alveolar air it is ii ______ mmHg.
How much percent of C02 is transported in a dissolved form as carbonic acid?
____________ is necessary for the respiration in plant.
Which is the correct sequence of air passage during inhalation?
On a very cold morning, Boojho and Paheli were talking with each other as they walked down to their school. They observed that the air coming out of their mouth looked like smoke. They were amused and wondered how it happened. Help them find the answer.
Match the correct answers with the type of respiration and respiratory substances.
| Respiration | Types of Substrates |
| A. Floating respiration | I. Proteins |
| B. Cytoplasmic respiration | II. Glucose |
| C. Protoplasmic respiration | III. Carbohydrates and fats |
List the similarities between aerobic and anaerobic respiration.
