A Level Exam > A Level Videos > Biology A-Level > Mechanism: Gaseous Exchange in Lungs
Mechanism: Gaseous Exchange in Lungs Video Lecture | Biology A-Level - A Level
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FAQs on Mechanism: Gaseous Exchange in Lungs Video Lecture - Biology A-Level - A Level
| 1. What is gaseous exchange in the lungs? |  |
Ans. Gaseous exchange in the lungs refers to the process by which oxygen is taken in and carbon dioxide is removed from the blood. It occurs in the tiny air sacs called alveoli in the lungs, where oxygen from the inhaled air diffuses into the bloodstream, while carbon dioxide from the bloodstream diffuses into the alveoli to be exhaled.
| 2. How does gaseous exchange occur in the lungs? | |
Ans. Gaseous exchange in the lungs occurs through a process called diffusion. The alveoli are surrounded by a network of tiny blood vessels called capillaries. Oxygen from the inhaled air enters the alveoli and diffuses across the thin walls of the alveoli and capillaries into the bloodstream. At the same time, carbon dioxide, which is produced as a waste product in the body, diffuses from the bloodstream into the alveoli to be exhaled.
| 3. What factors affect gaseous exchange in the lungs? | |
Ans. Several factors can affect gaseous exchange in the lungs. These include the concentration gradient of gases, the surface area available for exchange, the thickness of the respiratory membrane, and the efficiency of blood flow through the capillaries surrounding the alveoli. Any condition that alters these factors, such as lung diseases or decreased lung function, can impair gaseous exchange.
| 4. How does exercise affect gaseous exchange in the lungs? | |
Ans. Exercise can significantly impact gaseous exchange in the lungs. During exercise, the body's oxygen demand increases, leading to a higher breathing rate and deeper breaths. This increases the ventilation of the lungs, allowing more oxygen to enter the alveoli and more carbon dioxide to be expelled. Additionally, exercise improves lung function and strengthens respiratory muscles, enhancing the efficiency of gaseous exchange.
| 5. What are some common lung diseases that can affect gaseous exchange? | |
Ans. Several lung diseases can affect gaseous exchange in the lungs. Some common examples include chronic obstructive pulmonary disease (COPD), asthma, pneumonia, and emphysema. These conditions can cause inflammation, narrowing of airways, and damage to lung tissues, leading to impaired gaseous exchange. It is important to seek medical attention if experiencing symptoms of these lung diseases to maintain proper respiratory function.
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Nov 21, 2024 Last updated |
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