Advertisements
Advertisements
प्रश्न
Why do the walls of trachea not collapse when there is less air in it?
Advertisements
उत्तर
The walls of trachea do not collapse when there is less air in it because trachea is supported by rings of soft bones called cartilage.
APPEARS IN
संबंधित प्रश्न
Given below are the end products of different reactions involving glucose.
Write the reaction number in front of the following:
(i) Anaerobic reaction =
(ii) Reaction in the human muscles =
(iii) Aerobic respiration =
(iv) Reaction in the plant cells =
(v) Reaction in the liver
The exchange of respiratory gases in the cells of plants occurs by the process of _______________
(a) Osmosis
(b) Diffusion
(c) Glycolysis
(d) exhalation
Name one substance which is produced in anaerobic respiration by an organism but not in aerobic respiration.
Name the pores in a leaf through which respiratory exchange of gases takes place.
State whether the following statement is true or false:
Fish and earthworm exchange gases during respiration in the same way.
Name the type of respiration in which the end product is:
Lactic acid
Give one example where such a respiration can occur.
Which contains more carbon dixoide : exhaled air or inhaled air? Why?
The photosynthesis in a plant is not taking place during the day time if the plant is releasing:
An organism X having breathing organs A lives on land. When organism X goes underwater, it cannot survive for a long time unless carrying an oxygen cylinder. On the other hand, the organism Y having breathing organs B always lives in water and if taken out of the water, it dies after a short while. A third organism Z having breathing organs C and D which lives on the banks of ponds, lakes, and rivers can survive on land as well as in water equally well.
(a) What could organism X be? Name the breathing organs A.
(b) What could organism Y be? Name the breathing organs B.
(c) What could organism Z be? Name the breathing organs C and D.
(d) Out of X, Y, and Z, which organism is (i) amphibian, (ii) aquatic, and (iii)
terrestrial?
Veins and arteries carry blood. Which of these carry blood away from the heart?
A student has set up "CO2 is released during respiration”. After about 1 hour he observes no change in the water level in the delivery tube. Write two possible resons for the failure of the experiment.
Choose the odd one out in the following groups of four items each:
Ethyl alcohol, Carbon dioxide, Starch, Oxygen
Name the body structure concerned with the given functional activity:
Transports oxygen to the body cells.
State one function of the following:
Pleural fluid
How is the respiratory passage kept free of dust particles?
Given below is an overall chemical reaction of a certain process:
C6H12O6→LacticAcid+2ATP+Heat enengy
Name one tissue in which this reaction occur.
____________ is the maximum amount of air that the lungs can hold after a maximum forceful inspiration.
Which of the following statement(s) is (are) true about respiration?
- During inhalation, ribs move inward and the diaphragm is raised
- In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from the blood into the alveolar air
- Haemoglobin has a greater affinity for carbon dioxide than oxygen
- Alveoli increase surface area for the exchange of gases
Which is the correct sequence of air passage during inhalation?
Yeast is used in wine and beer industries because it respires ______.
