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Respiratory System - Biology, General Science Video Lecture | General Awareness & Knowledge - Bank Exams

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FAQs on Respiratory System - Biology, General Science Video Lecture - General Awareness & Knowledge - Bank Exams

1. What is the main function of the respiratory system?
Ans. The main function of the respiratory system is to facilitate the exchange of oxygen and carbon dioxide between the body and the environment. This is achieved through the process of breathing, where oxygen is inhaled into the lungs and carbon dioxide is exhaled out.
2. How does the respiratory system protect the body from harmful substances?
Ans. The respiratory system has various mechanisms to protect the body from harmful substances. The first line of defense is the hairs and mucus in the nose, which trap larger particles and prevent them from entering the lungs. Additionally, the respiratory system produces mucus and has small hair-like structures called cilia lining the airways, which help to trap and remove any foreign particles or pathogens that may have entered the lungs.
3. What are the main organs involved in the respiratory system?
Ans. The main organs involved in the respiratory system are the nose, pharynx, larynx, trachea, bronchi, and lungs. The nose acts as the main entrance for air, and the air then passes through the pharynx, larynx, and trachea before reaching the bronchi and lungs, where the exchange of gases takes place.
4. How does the respiratory system regulate the pH balance of the body?
Ans. The respiratory system plays a crucial role in regulating the pH balance of the body by controlling the levels of carbon dioxide in the blood. When carbon dioxide levels increase, the body responds by increasing the rate and depth of breathing, allowing more carbon dioxide to be exhaled. This helps to decrease the concentration of carbon dioxide in the blood, which helps maintain a balanced pH level.
5. How does smoking affect the respiratory system?
Ans. Smoking has numerous harmful effects on the respiratory system. The chemicals in tobacco smoke can irritate and damage the lining of the airways, leading to inflammation and increased mucus production. This can cause chronic bronchitis and increase the risk of developing respiratory infections. Smoking also damages the cilia in the airways, impairing their ability to remove mucus and foreign particles, which can lead to the accumulation of debris in the lungs. Additionally, smoking is a major risk factor for lung cancer and other respiratory diseases.
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