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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.
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
What are the different ways in which glucose is oxidized to provide energy in various organisms?
Fill in the following blank with suitable word:
The actual exchange of gases takes place in the ___________ of the lungs.
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 fish.
Describe the process of respiration in the following part of a plant:
Root
Why is diffusion insufficient to meet the oxygen requirements of large multicellular organisms like humans?
Internal respiration may be defined as:
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?
An animal in which the oxygenation of blood does not take place in the lungs is:
Veins and arteries carry blood. Which of these carry blood back to the heart?
Answer the following in detail.
Explain the process of Cellular Respiration.
Name the body structure concerned with the given functional activity:
Prevents food from entering the trachea during swallowing.
Which chemical compound inside a cell can be termed "Currency of Energy"?
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 _____________.
Answer the following question.
How is O2 and CO2 transported in human beings?
Name the organs that bring about respiration.
Which of the following equations is the summary of photosynthesis?
Breathing is a process that
- provides O2 to the body.
- breaks down food to release energy.
- helps the body to get rid of CO2.
- produces water in the cells.
Which of the following gives the correct combination of functions of breathing?
Mark the following statement as True or False. Correct the false statement.
Exhaled air has more percentage of CO2 than inhaled air
