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The gas excreted through the alveoli is carbon dioxide (CO2). During the process of respiration, oxygen is taken in by the lungs, while carbon dioxide, a waste product of cellular metabolism, is expelled from the bloodstream into the alveoli and exhaled out of the body. This exchange of gases is crucial for maintaining the body's acid-base balance and overall homeostasis.
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What is the direction of movement of gas between the blood and the alveolar duct?
Gas moves by diffusion from areas of high concentration to areas of low concentration. In the lungs, oxygen moves from the alveolar ducts into the blood in the capillaries, while carbon dioxide moves from the blood into the alveolar ducts to be exhaled.
What are the most numerous cells in the lungs?
The most numerous cells in the lungs are the alveolar epithelial cells, specifically the type I alveolar cells which make up about 95% of the alveolar surface area. These cells are responsible for gas exchange and maintaining the structural integrity of the alveoli.
What is an alveolar plateau?
An alveolar plateau refers to the phase during a pulmonary function test when stable alveolar gas exchange occurs, resulting in a horizontal line on the volume-time curve. This plateau indicates that sufficient time has elapsed for oxygen and carbon dioxide to equilibrate between the alveoli and the capillaries. It is used to assess the efficiency of gas exchange in the lungs.
What point on the capnographic waveform represent a mixture of alveolar gas and dead space gas?
The point on the capnographic waveform that represents a mixture of alveolar gas and dead space gas is known as the "initial upstroke" or the "beginning of the expiratory phase." This occurs at the start of expiration when exhaled air first contains carbon dioxide from the alveoli, mixed with air from the conducting airways or dead space. This mixture results in a gradual rise in the capnography trace before achieving a plateau during the exhalation of primarily alveolar gas.
What is intra-alveolar surface tension due to?
Intra-alveolar surface tension is due to the presence of surfactant molecules that reduce surface tension within the alveoli, preventing lung collapse by maintaining alveolar stability during breathing. Surfactant helps to reduce the work of breathing and facilitates gas exchange by preventing alveolar collapse at the end of expiration.
Does the gas exchange function of the respiratory system occur in the alveoli?
Yes gas is transferred through the alveolar/capillary membrane in the alveolus. Gas moves from the alveolar air sacs to the pulmonary capillaries.
What gas is excreted through the alveoli?
carbon dioxide
What does the alveoi do?
They are especially significant in the gas (air) exchange through to the pulmonary alveolar-capillary membrane.
3 What gas is excreted through the lungs as a waste product of respiration?
Carbon dioxide.
Three ways in which the lungs are adapted for gas exchange?
Many alveoli-increases surface area for gas exchange Thin alveolar wall-allows gases to diffuse easily and fast Thin capillary wall-easy diffusion Inner wall of alveoli-allows gases to dissolve, which they need to enter the capillary
Explain the way anatomical shunt through the bronchial circulation causes an PO2 difference between alveolar gas and arterial blood.?
because it wants toExplain the way anatomical shunt through the bronchial circulation causes an PO2 difference between alveolar gas and arterial blood.? In: Circulatory System [Edit categories]
What is an alveolar dead space?
An alveolar dead space is the volume of air in the alveoli of the lungs which does not partake in gas exchange.
What is the difference between alveolar sac and an alveolus?
Alveolus is a single structure in the lungs where gas exchange occurs, while alveolar sac is a cluster of alveoli where multiple gas exchange processes happen simultaneously. Alveolar sacs are made up of multiple alveoli grouped together.
Where is carbon dioxide excreted in animals?
gas
What is the direction of movement of gas between the blood and the alveolar duct?
Gas moves by diffusion from areas of high concentration to areas of low concentration. In the lungs, oxygen moves from the alveolar ducts into the blood in the capillaries, while carbon dioxide moves from the blood into the alveolar ducts to be exhaled.
Which part of the respiratory system consists of air sacs with capillaries?
That sounds like a general description of the LUNGS.The lungs are loaded with pulmonary alveoli: small outpouchings along the walls of the alveolar sacs and alveolar ducts; through them, gas exchange takes place between alveolar gas and pulmonary capillary blood.
What is the volume of gas that reaches the respiratory zone of the lungs called?
alveolar ventilation
