What are the factors on which surface tension depends?
Surface tension depends on the nature of the liquid, the surrounding environment and temperature. Liquids where molecules have large attractive intermolecular force will have a large surface tension.
How do you explain surface tension?
Surface Tension: “The property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of its molecules.” The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension.
What is the difference between surface tension and buoyancy?
Buoyancy is the ability for an object to float in water or other fluids. Surface tension is the tension the surface of the liquid caused that attract the particles in the surface layer by the bulk of the liquid, and minimizes surface areas.
Why is surface tension important in the lungs?
Pulmonary Surfactant The force of surface tension in the lungs is so great that without something to reduce the surface tension, the airways would collapse after exhalation, making re-inflation during inhalation much more difficult and less effective. Collapse of the lungs is called alectasis.
How does surface tension work in lungs?
Increased surface tension increases cohesion within the alveoli, pulling the alveoli closed. The alveolar cells produce a specialized liquid, surfactant, that decreases the surface tension in the airways reducing the amount of energy required to expand the lungs.
How do surfactants affect surface tension?
The cohesive forces between the water molecules are very strong making the surface tension of water high. As surfactants absorb they break these interactions. The intermolecular forces between surfactant and water molecule are much lower than between two water molecules and thus surface tension will decrease.
How does surface tension aid in expanding the lungs during inspiration?
Surface tension of alveolar fluid, which is mostly water, also creates an inward pull of the lung tissue. This inward tension from the lungs is countered by opposing forces from the pleural fluid and thoracic wall. Surface tension within the pleural cavity pulls the lungs outward.
What are the medical implications of LaPlace law of surface tension?
Danger of Aneurysms The larger arteries of the body are subject to higher wall tensions than the smaller arteries and capillaries. This wall tension follows the dictates of LaPlace’s law, a geometrical relationship which shows that the wall tension is proportional to the radius for a given blood pressure.
What happens to intrapleural pressure during inspiration?
During inspiration, intrapleural pressure drops, leading to a decrease in intrathoracic airway pressure and airflow from the glottis into the region of gas exchange in the lung. The cervical trachea is exposed to atmospheric pressure, and a pressure drop also occurs from the glottis down the airway.
What structures in the lungs does gas exchange takes place?
Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
What is the pathway taken by air in the respiratory system illustrate with a Labelled diagram?
Air enters the nostrils passes through the nasopharynx, the oral pharynx through the glottis into the trachea into the right and left bronchi, which branches and rebranches into bronchioles, each of which terminates in a cluster of alveoli Only in the alveoli does actual gas exchange takes place.
Why are alveoli referred to as the sites of respiration?
The Alveoli in Your Lungs. Alveoli are tiny air sacs in your lungs that take up the oxygen you breathe in and keep your body going. Although they’re microscopic, alveoli are the workhorses of your respiratory system.
What is the pathway of respiration Class 10?
The process of respiration involves the lungs and mitochondria of the cells. The mechanism by which organisms obtain oxygen from the air and release carbon dioxide is called breathing. Respiration includes breathing as well as the oxidation of food in the cells of the organism to release energy.
What are different types of respiration Class 10?
Types of respiration
- 1)Aerobic Respiration:The respiration which uses oxygen is called aerobic respiration.
- 2 pyruvate ——–>6 carbon dioxide+6 water + 38energy (ATP)
- 2)Anaerobic Respiration:The respiration which take place without oxygen is called anaerobic respiration.
- Glucose———>Pyruvate ——->2 lactic acid + 2 ATP.
What is respiration very short answer?
1 : the act or process of breathing : the inhaling of oxygen and the exhaling of carbon dioxide. 2 : the process by which cells use oxygen to break down sugar and obtain energy. respiration. noun.
What is the simple definition of respiration?
In physiology, respiration is the movement of oxygen from the outside environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction. In contrast, exhalation (breathing out) is usually a passive process.