Surface Tension in Lung Alveoli
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4 سال پیش
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Video Summary:
Surface tension is special force between water molecules on the surface. Oxygen and hydrogen atoms in water molecule are partially charged. Positive charge on the hydrogen atom of one water molecule attracts the oxygen atom with negative charge of the other water molecule. Water molecules deep in the water phase experience such attraction in all the directions so there is no net force acting on deep water molecules. However the water molecules on the surface have no other water molecule to pull them outside the water phase. So such water molecules experience net force towards the bulk water phase. As some water molecules are pulled deep in, the remaining water molecules on the surface develop tension. This is surface tension. In lung, alveoli are lined by fluid. And the remaining space in alveoli is filled with air. So there is air-fluid interface in alveoli. This interface tries to decrease it's surface area. And in doing so, they collapse alveoli. So extra pressure is required to expand the alveoli with high surface tension.
🎞More videos on Respiratory Physiology:
● Transport of Gases
- Oxygen Hemoglobin Dissociation Curve: Oxygen Hemoglobin Dissociation Curve
- Factors Shifting Oxygen Hemoglobin Dissociation Curve: Factors Shifting Oxygen Hemoglobin Di...
- Oxygen Hemoglobin Dissociation Curve during Exercise: Oxygen Hemoglobin Dissociation Curve ...
- Transport Of Carbon Dioxide: Transport of Carbon Dioxide in blood
- Carbon Dioxide Dissociation Curve: Carbon Dioxide Dissociation Curve
- Haldane Effect: Haldane Effect in Transport of Carbon...
● Lung Mechanics
- Alveolar Pressure and Pleural Pressure: Alveolar Pressure and Pleural Pressure
- Surface Tension in Lung Alveoli: Surface Tension in Lung Alveoli
- Surfactants Mechanism of Action: Surfactants Mechanism of Action
- Functions of Surfactants: Functions of Surfactants in Alveoli
- Compliance of Lungs: Compliance of Lungs
- Diseases Affecting Lung Compliance: Diseases Affecting Lung Compliance
• Ventilation & Dead Spaces in Respiratory Tract: Ventilation & Dead Spaces in Respirat...
• Lung Volumes and Capacities: Lung volumes and capacities
• What Determines Lung Volume?: What Determines Lung Volume?
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• Instagram: Instagram: NonstopNeuron
DISCLAIMER: This video is for education purpose only. Although every effort is made to ensure accuracy of material, viewer should refer to the appropriate regulatory body/authorised websites, guidelines and other suitable sources of information as deemed relevant and applicable. In view of possibility of human error or changes in medical science, any person or organization involved in preparation of this work accepts no responsibility for any errors or omissions or results obtained from use of information in this video.
All videos from respiratory physiology: https://www.nonstopneuron.com/post/ph...
Video Summary:
Surface tension is special force between water molecules on the surface. Oxygen and hydrogen atoms in water molecule are partially charged. Positive charge on the hydrogen atom of one water molecule attracts the oxygen atom with negative charge of the other water molecule. Water molecules deep in the water phase experience such attraction in all the directions so there is no net force acting on deep water molecules. However the water molecules on the surface have no other water molecule to pull them outside the water phase. So such water molecules experience net force towards the bulk water phase. As some water molecules are pulled deep in, the remaining water molecules on the surface develop tension. This is surface tension. In lung, alveoli are lined by fluid. And the remaining space in alveoli is filled with air. So there is air-fluid interface in alveoli. This interface tries to decrease it's surface area. And in doing so, they collapse alveoli. So extra pressure is required to expand the alveoli with high surface tension.
🎞More videos on Respiratory Physiology:
● Transport of Gases
- Oxygen Hemoglobin Dissociation Curve: Oxygen Hemoglobin Dissociation Curve
- Factors Shifting Oxygen Hemoglobin Dissociation Curve: Factors Shifting Oxygen Hemoglobin Di...
- Oxygen Hemoglobin Dissociation Curve during Exercise: Oxygen Hemoglobin Dissociation Curve ...
- Transport Of Carbon Dioxide: Transport of Carbon Dioxide in blood
- Carbon Dioxide Dissociation Curve: Carbon Dioxide Dissociation Curve
- Haldane Effect: Haldane Effect in Transport of Carbon...
● Lung Mechanics
- Alveolar Pressure and Pleural Pressure: Alveolar Pressure and Pleural Pressure
- Surface Tension in Lung Alveoli: Surface Tension in Lung Alveoli
- Surfactants Mechanism of Action: Surfactants Mechanism of Action
- Functions of Surfactants: Functions of Surfactants in Alveoli
- Compliance of Lungs: Compliance of Lungs
- Diseases Affecting Lung Compliance: Diseases Affecting Lung Compliance
• Ventilation & Dead Spaces in Respiratory Tract: Ventilation & Dead Spaces in Respirat...
• Lung Volumes and Capacities: Lung volumes and capacities
• What Determines Lung Volume?: What Determines Lung Volume?
● Follow me at:
• Facebook: Facebook: NonstopNeuron
• Instagram: Instagram: NonstopNeuron
DISCLAIMER: This video is for education purpose only. Although every effort is made to ensure accuracy of material, viewer should refer to the appropriate regulatory body/authorised websites, guidelines and other suitable sources of information as deemed relevant and applicable. In view of possibility of human error or changes in medical science, any person or organization involved in preparation of this work accepts no responsibility for any errors or omissions or results obtained from use of information in this video.
4 سال پیش
در تاریخ 1399/08/18 منتشر شده
است.
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