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11 Cards in this Set
- Front
- Back
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Inspiration |
Active Muscle Contraction, 1. Diaphragm, 2. External inter coastal muscles |
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The lung drops below atmosphere pressure to? |
Let airflow in |
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Air flows into the lung to? |
Pressure rises as the air enters. The lung pressure=760mmHg which equals to 1 atm. And no more air flows in |
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Forced Inspiration and Forced Expiration |
1.Inspiration add in the efforts of neck and shoulder muscles, (scalenes, slernocleidomastoids) 2. Expiration add in abdominal muscle, internal intercostal muscles. |
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Airflow and the Airways |
1.The air enters the respiratory system through the mouth and/or the nasopharynx 2.Enters the trachea: big tube that has a lot of cartilage. Very fast airflow. 3.As the air enters the bronchi it slows down and it becomes wetter, and warmer. |
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The Bronchioles |
Broncho construction: resistance increase and broncho dilation: resistance drops. They are designed to match the airflow to the lung perfusion (blood flow) |
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What other things can cause broncho construction? |
Pollen, dust, dander, and asthma |
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Static Lung Volumes |
*Tidal volume @rest is 500ml *Inspiratory Reserve @rest is 2000ml *Expiratory Reserve=1500ml *Vital Capacity: TV+IRV+ERV=4500ml to 5000ml |
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Residual Volume |
Air in the lungs follow a maximal expiration of approximately 1000ml |
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Gas Exchange |
They occur @ the alveoli located with 1. Respiratory bronchioles 2. Respiratory/Alveolar ducts 3. Alveolar Sacs |
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All Alveoli are..? |
Coated with a thin layer of H2O. That is important for gas exchange, problematic too: causes cohesiveness/stickiness between H2O molecules. |
