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Describe how atmospheric and alveolar air differ in composition and explain the differences?
Atmospheric (external) air contains a high percentage of oxygen and nitrogen whereas alveoli gas contains a lower percentage of oxygen and a higher percentage of carbon dioxide. The differences in composition are due to the fact that gaseous exchange is taking place within the alveoli in the lungs. Oxygen is diffusing from the alveoli into the pulmonary artery and carbon dioxide is diffusing back into the alveoli from the pulmonary artery due to the concentration gradients. This is the main reason why external air and alveolar gas have such different compositions.
Another reason why the gas compositions are different is due to the fact that alveoli gas contains a mixture of both atmospheric air which has been inhaled and 'old' air which stays in the respiratory track and is not exhaled after each breath therefore giving it a different composition.
Alveolar gas has a larger percentage of water vapour than atmospheric air due to the fact that air is being warmed and moistened as it travels into the respiratory track. This is done by the mucus in the nasal cavity as the air travels past it.
What else can I help you with?
Is Alveolar PCO2 identical to atmospheric PCO2?
No, it is higher or the CO2 would not move out of the lungs.
What is the alveolar pressure during expiration?
During expiration, alveolar pressure increases as the diaphragm and intercostal muscles relax, causing the lungs to contract. This rise in pressure exceeds atmospheric pressure, leading to the expulsion of air from the lungs. Typically, alveolar pressure during expiration can reach around +1 to +2 mmHg above atmospheric pressure, facilitating airflow out of the respiratory system.
What is the adjective for alveolus?
The adjective for alveolus (singular) or alveoli (plural) is alveolar.
3.What was the phrase proposed by Douglas Atwood (1971) to describe marked atrophy of alveolar bone following tooth loss?
Douglas Atwood proposed the phrase "alveolar bone resorption" in 1971 to describe the marked atrophy of alveolar bone that occurs following tooth loss. This phenomenon highlights the loss of bone density and volume that can significantly impact oral health and the stability of remaining teeth. Atwood's work emphasized the importance of understanding this process in the context of dental treatment and rehabilitation.
Is Alveolar recoil lead to a decrease in intr-alveolar pressure?
NO
What is an example of compound alveolar?
The word "cat" is an example of a compound alveolar as it is composed of the alveolar consonants /k/ and /t/.
During expiration the alveolar pressure must be?
During expiration, the alveolar pressure must exceed atmospheric pressure to allow air to flow out of the lungs. This is achieved by the contraction of the diaphragm and intercostal muscles, which reduces the volume of the thoracic cavity and increases the pressure within the alveoli. As a result, air is expelled from the lungs until the pressures equalize again.
The exchange of gases between alveolar air and blood is due to?
The exchange of gases between alveolar air and blood is due to diffusion. Oxygen moves from the alveoli into the blood, while carbon dioxide moves from the blood into the alveoli, driven by differences in partial pressures of the gases. This allows for oxygen to be taken up by red blood cells and carbon dioxide to be removed from the body.
What is alveolar macrophages also known as?
Alveolar macrophages, aka DUST CELLS.
What is alveolar ridge in Yoruba?
Alveolar ridge in Yoruba can be translated as "ilẹ̀ iigboori."
What is pulmonary alveolar proteinosis?
Pulmonary alveolar proteinosis (PAP) is a rare disease of the lungs.
What keeps the surface between the air and the alveolar cells moist in the lung?
alveolar fluid
