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प्रश्न
Explain why, when air is taken in and let out during breathing, the lungs always contain a residual volume of air.
Give reason for the following:
Lungs always contain a residual volume of air.
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उत्तर
To maintain gas exchange efficiency. The lungs leftover air volume provides continuous oxygen to the blood, preventing alveolar collapse between breaths. This maintains oxygen levels and promotes gas diffusion.
संबंधित प्रश्न
Carbon dioxide enters into the leaves through tiny pores present on the surface of the leaf called _________.
(a) chlorophyll
(b) chloroplast
(c) stomata
(d) epidermis
During heavy exercise, we get cramps in the legs due to the accumulation of ______.
What is the name of tiny air-sacs at the end of smallest bronchioles in the lungs?
What is the other name of wind-pipe?
During respiration, the plants take CO2 and release O2.
Fill in the Following Blank with Suitable Word.
_________ In the Lungs Provide a Very Large Surface Area for Gaseous Exchange.
The breathing and respiration in woody stem of a plant takes place through:
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?
When a person breathes in the air, the air enters into his body through an organ A having two holes B in it. The air then passes through the pharynx and larynx and enters into tube C. The tube C divides into two smaller tubes D at its lower end. The two smaller tubes are attached to two respiratory organs E. Each smaller tube divides inside the organs E to form a large number of still smaller tubes called F. The smallest tubes F have air-sacs G at their ends in which gaseous exchange takes place in the body of the person. What are A, B, C, D, E, F, and G?
Out of xylem and phloem, which one carries materials only upwards?
Choose the odd one out in the following groups of four items each:
Trachea, Bronchus, Alveolus, Diaphragm
Name the body structure concerned with the given functional activity:
Provides actual diffusion of respiratory gases in the lungs.
Given below is an example of certain structure and its special functional activity:
"Kidney and excretion".
Fill in the blanks on a similar pattern.
Epiglottis and _____________.
State one function of the following:
Diaphragm
State one function of the following:
Pleural fluid
Answer the following question.
How is O2 and CO2 transported in human beings?
With which of the following haemoglobin combines to form carboxyhaemoglobin?
____________ is necessary for the respiration in plant.
Glycolysis process occurs in which part of the cell?
