0
ventilation is not even throughout the lungs due to gravity.
Alveoli in the top of the lung are already more expanded than at the bottom. The pleural pressure is less (more negative) at the apex than the base. This is since the weight of the lung pulls it downward away from the chest wall.
At the beginning of inspiration, the alveoli are at different lung volumes and hence at different locations along the pressure-volume curve.
The alveoli at the base start off smaller and are located near the steep portion of the curve, since they start off smaller, they can expand more and as a result have greater compliance and receive more tidal volume.
In contrast, the already expanded alveoli at the apex cannot expand as much as they already start off close to their limit. Hence, they are closer to the top of the curve and receive less of the tidal volume.
So in upright individuals, the base of the lung receives more of the tidal volume and hence is more ventilated.
What else can I help you with?
What bone contains the apex and base?
The patella has a base which is the attachment for the quadriceps tendon and the apex (more pointed end) which is the attachment for the patellar ligament which attaches the patella to the tibia.
How many edges does a octagon base pyramid have?
16. The base has eight around it and there are eight more connecting the vertices of the base to the apex of the pyramid.
Which of the following is a characteristic of speaking as compared to writing?
Speaking is more formal than writing (apex)
Which 3d shapes have 10 corners?
A nonagon based pyramid. An octagon based dipyramid. An octagonal base with a double-apex "pyramid". A heptagonal base with a triple-apex "pyramid". A heptagonal pyramid with a double-apex "pyramid" on the other side. A pentagonal prism. There are many more.
Why do trucks need more distance to stop?
because they have more weight as compared to wheel base
How many matches to make a skeletal square pyramid?
Eight. Four for the square base and four more going up to the apex from each corner of the base.
Height of triangle?
The height of a triangle is the perpendicular distance measured from the chosen base (or base extension*) to its opposite vertex (or apex)+.* If any of the shorter sides of an obtuse triangle is chosen to be the base, an extension need to be drawn to this base so that a perpendicular can be constructed from the apex down to this base extension.There are three sides to a triangle, hence three possible bases. Each base will have a corresponding height that is measured from the opposite vertex or apex+.A vertex is the point when 2 sides of a figure intersect.(Read more: vertex)+ A triangle has 3 vertices. 2 vertices defines the length of the base. There remains one vertex that is not touching the base. This vertex is opposite to the base (or base extension) and it is referred to as the apex.
How can you find more information about ventilation systems?
One can find more information about ventilation systems in several ways. First, one could research ventilation systems through ventilation system installers. Also, one can find more information about ventilation systems through blogs.
All of the following are characteristics of AP courses compared with regular high school courses except?
apex - they require more class time
How many more vertices square pyramid have than triangular pyramid?
1. A square pyramid has one apex and four vertices on it's square base (5) A triangular pyramid has one apex and three vertices on it's triangular base (4)
What would happen to weak base dissociation equilibrium if more products were added?
The concentration of products would increase. apex
How do you use the word ventilation in a sentence?
I opened all the window in my house to get some ventilation.
