A Level Exam > A Level Videos > Biology A-Level > Breathing Mechanism & Respiratory Volumes
Breathing Mechanism & Respiratory Volumes Video Lecture | Biology A-Level - A Level
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FAQs on Breathing Mechanism & Respiratory Volumes Video Lecture - Biology A-Level - A Level
| 1. What is the breathing mechanism? |  |
Ans. The breathing mechanism refers to the process by which air is taken into the lungs and expelled out. It involves the coordination of various muscles and organs, including the diaphragm and intercostal muscles, to create changes in lung volume and pressure, allowing for the exchange of gases.
| 2. What are respiratory volumes? | |
Ans. Respiratory volumes are the different measurements used to quantify the amount of air inhaled or exhaled during various stages of the breathing cycle. These volumes include tidal volume (the amount of air inhaled or exhaled during normal breathing), inspiratory reserve volume (the maximum amount of air that can be inhaled after a normal inhalation), and expiratory reserve volume (the maximum amount of air that can be exhaled after a normal exhalation), among others.
| 3. How does the diaphragm contribute to the breathing mechanism? | |
Ans. The diaphragm is a dome-shaped muscle located below the lungs that plays a crucial role in the breathing mechanism. During inhalation, the diaphragm contracts and moves downward, creating a vacuum in the chest cavity, which allows air to be drawn into the lungs. During exhalation, the diaphragm relaxes and moves upward, pushing air out of the lungs.
| 4. What factors influence respiratory volumes? | |
Ans. Several factors can influence respiratory volumes. These include age, gender, physical fitness, and certain medical conditions. For example, individuals with respiratory diseases such as asthma or chronic obstructive pulmonary disease (COPD) may have reduced respiratory volumes compared to healthy individuals.
| 5. How can respiratory volumes be measured? | |
Ans. Respiratory volumes can be measured using a device called a spirometer. A spirometer is a device that measures the volume of air inhaled and exhaled by an individual. The individual breathes into a mouthpiece connected to the spirometer, and the device records the changes in air volume. This information can be used to calculate various respiratory volumes.
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Nov 21, 2024 Last updated |
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