Which of the following is not the function of the conducting part of the respiratory system?
- It clears inhaled air from foreign particles
- Inhaled air is humidified
- Temperature of inhaled air is brought to body temperature
- Provides surface for diffusion of O2 and CO2
The Correct Option is D
Solution and Explanation
The conducting part of the respiratory system is primarily responsible for transporting air to the lungs. It includes structures like the nose, pharynx, larynx, trachea, bronchi, and bronchioles. Each of these structures plays an important role in conditioning the air before it reaches the lungs. Let's analyze the functions provided in the options:
- Clears inhaled air from foreign particles: The conducting system is equipped with cilia and mucus in the airways that trap and remove foreign particles, preventing them from reaching the lungs.
- Inhaled air is humidified: As air passes through the nasal passages and upper parts of the conducting system, it is humidified, which is essential for maintaining the moisture of the alveolar surface.
- Temperature of inhaled air is brought to body temperature: The conducting airways help adjust the temperature of the inhaled air close to body temperature before it reaches the lungs.
- Provides surface for diffusion of O2 and CO2: This is not a function of the conducting part. The process of gas exchange, i.e., the diffusion of oxygen (O2) and carbon dioxide (CO2), occurs in the alveoli of the lungs, which are part of the respiratory (not the conducting) portion of the respiratory system.
Therefore, the correct answer is: Provides surface for diffusion of O2 and CO2, as this function is specific to the alveolar regions, not the conducting parts of the respiratory system.
Top Questions on Exchange Of Gases
Which of the following statements about the pharynx and larynx is/are correct?
(1) The pharynx serves as a pathway for both food and air.
(2) The larynx is involved in the production of sound.
(3) The pharynx contains the vocal cords.
(4) The larynx prevents food from entering the trachea.
Choose the correct options from the given below:- MHT CET - 2024
- Biology
- Exchange Of Gases
- Under normal physical conditions in human beings every 100 ml oxygenated blood can deliver____ml of O2 to the tissues.
- NEET (UG) - 2023
- Biology
- Exchange Of Gases
- Given below are two statements:
Statement I: Greenhouse gases are increasing due to industrial development, exponential increase in energy production and use
Statement II: Increase in the concentration of greenhouse gases is directly dependent upon anthropogenic activities.
In the light of the above statements, choose the most appropriate answer from the options given below- CUET (PG) - 2023
- Agroforestry
- Exchange Of Gases
- The partial pressures (in mm Hg) of oxygen (O2 ) and carbon dioxide (CO2 ) at alveoli (the site of diffusion) are
- NEET (UG) - 2021
- Biology
- Exchange Of Gases
- Identify the wrong statement with reference to transport of oxygen
- NEET (UG) - 2020
- Biology
- Exchange Of Gases
Questions Asked in NEET exam
- Given below are two statements:
Statement I: Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it.
Statement II: Fig wasp and fig tree exhibit a mutual relationship as the fig wasp completes its life cycle in the fig fruit and the fig fruit gets pollinated by the fig wasp. - A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
- NEET (UG) - 2025
- Resistance
- With the help of the given pedigree, find out the probability for the birth of a child having no disease and being a carrier (has the disease mutation in one allele of the gene) in the F3 generation.
- NEET (UG) - 2025
- Genetics
- The plates of a parallel plate capacitor are separated by d. Two slabs of different dielectric constant \(K_1\) and \(K_2\) with thickness \(d/2\) and \(d/2\) respectively are inserted in the capacitor. Due to this, the capacitance becomes two times larger than when there is nothing between the plates. If \(K_1 = 1.25 K_2\), the value of \(K_2\) is :
- NEET (UG) - 2025
- Capacitors and Capacitance
A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is :
- NEET (UG) - 2025
- Moment Of Inertia
Concepts Used:
Breathing and Exchange of Gases
A metabolic process, which is carried out by all living organisms including plants, animals, and humans for the production of energy and to stay alive is Respiration. Except for required anaerobes, every other organism from amoeba to humans needs oxygen for survival. And evolution has reported a number of systems that allows the exchange of gases in organisms.
There are two types of respiration such as;
- Aerobic respiration — to produce energy, it occurs in the presence of oxygen
- Anaerobic respiration — to produce energy, occurs in the absence of oxygen
Breathing can be simply derived as the process of inhaling oxygen gas from the atmosphere and exhaling the carbon dioxide gas back into the atmosphere is termed breathing and the process is commonly known as respiration.
Read More: Breathing and Exchange of Gases