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What happens when pressure in the lung is greater than atmospheric pressure?
If the pressure in the lung is greater than atmospheric pressure, air will flow out of the lungs in order to equalize the pressure. This is called exhalation or breathing out.
Is intrapulmonary pressure greater than or less than?
Yes, typically it is.
When are the AV valves open?
when ventricular pressure becomes greater than atrial pressure
The pressure in the deepest parts of the ocean is roughly how many times the usual air pressure you experience?
The pressure in the deepest parts of the ocean can be over 1000 times greater than the usual air pressure you experience at the surface. This immense pressure is caused by the weight of the water above pushing down on the seabed.
What keeps the lungs from collapsing when the airways are open to the atmosphere?
The structure of the lungs, which are surrounded by a lining called the pleura, helps to keep them inflated. The pleural pressure is lower than the pressure inside the alveoli, creating a partial vacuum that prevents the lungs from collapsing. Additionally, the presence of surfactant in the alveoli reduces surface tension, helping to maintain lung expansion.
Is air pressure greater at the top of a mountain than at lower elevations?
No, it is greater at the lower elevations.
Why is the pressure in arteries much greater than in veins?
Because the arteries have smaller bore than veins. Through smaller cross sectional area blood flows with greater pressure.
Why constant pressure is always greater than constant volume?
You can't compare pressure with volume. Presumably, somebody was talking about something being greater AT constant pressure, compared to constant volume.
When does inspiration occur?
when atmospheric pressure is greater than the pressure within the lungs, inspiration occur.
What density does an object have to have to sink in water?
A density greater than that of water (which varies with temperature).
What should be the freezing point of water if its boiling point is greater than a 100 degrees?
Water boils at a temperature greater than 100 oC if the pressure is higher than atmospheric pressure but this has no effect on melting point.
What is caused when blood pressure is higher than normal?
hypertension
