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Questions
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.
Solution
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.
RELATED QUESTIONS
Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.
List the differences between aerobic and anaerobic respiration.
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
In the lungs what substance is taken into the body?
State the three common features of all the respiratory organs like skin, gills and lungs.
Name the energy currency in the living organisms. When and where is it produced?
During marathon, we sometimes get painful contractions of leg muscles due to the accumulation of one of the following in leg muscles. This is:
What happens to the glucose which enters the nephron tubule alongwith the filtrate?
It has been found that people living in very high mountains have many more red corpuscles in their blood than people living in plains. Which one of the following best accounts for this phenomenon?
In the lungs what substance is removed from the body?
Name the body structure concerned with the given functional activity:
Prevents food from entering the trachea during swallowing.
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:
Intercostal muscles
List the organs of Human respiratory system.
Answer the following question.
A gas is released during photosynthesis. Name the gas and also state the way by which the gas is evolved.
Why is respiration essential for life?
Respiration refers to ____________.
term 'respiration' includes
How much percent of C02 is transported in a dissolved form as carbonic acid?
