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प्रश्न
Why is diffusion insufficient to meet the oxygen requirements of large multicellular organisms like humans?
उत्तर
In small unicellular animals, such as Amoeba, the volume of their body is so small that oxygen can be introduced quickly into the whole body by the process of diffusion. This is because the cell of Amoeba is so small that the oxygen does not have to go far. But in case of large multicellular animals like humans, the volume of the body is so big that oxygen cannot quickly diffuse into all the cells of the body. This is because in these cases, the oxygen has to travel a very large distance to reach each and every cell of the body.
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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
What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration.
In the lungs what substance is taken into the body?
State whether the following statement is true or false:
during respiration, the plants take CO2 and release O2.
State whether the following statement is true or false:
Energy can be produced in cells without oxygen.
Fill in the Following Blank with Suitable Word.
_________ In the Lungs Provide a Very Large Surface Area for Gaseous Exchange.
Describe the process of respiration in the following part of a plant:
Stem
Why do fishes die when taken out of water?
Give the main points of difference between respiration in plants and respiration in animals.
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 → alevoli
The two organisms which breath only through their moist skin are:
Consider the following chemical reactions which take place in different organisms/tissues under various conditions:
(i) Glucose → Respiration ">Ethanol + Carbon dioxide + Energy
(ii) Glucose→ Respiration ">Carbon dioxide + Water + Energy
(iii) Glucose → Respiration "> Lactic acid + Energy
(a) Name one organism which respires according to equation (i) above.
(b) Name one organism which respires according to equation (ii) above.
(c) When and where does respiration represented by equation (iii) above take place?
(d) Which equation/equations represent aerobic respiration?
(e) Which equation/equations represent anaerobic respiration?
(f) Which of the above reactions produces the maximum amount of energy?
State one function of the following:
Diaphragm
Identify the CORRECT sequence of events for the transport of respiratory gases.
Complete the analogy.
Transport of CO2 by plasma : 7% :: Transport of CO2 by bicarbonate ions: ____________.
The major fraction of CO2 released during cellular respiration is transported by the blood to the lung capillaries ______
term 'respiration' includes
During the process of exhalation, the ribs move
Mark the following statement as True or False. Correct the false statement.
Exhaled air has more percentage of CO2 than inhaled air
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.
