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The pH level of the mucus also plays a role in its viscosity, as higher pH levels tend to alter the thickness of the mucus, making it less viscous. [1] Because of this, invading agents such as Helicobacter pylori, a bacterium that causes stomach ulcers, can alter the pH of the mucus to make the mucus pliable enough to move through. [3]
Mucus is produced continuously in the respiratory tract. Mucociliary action carries it down from the nasal passages and up from the rest of the tract to the pharynx, with most of it being swallowed subconsciously. Sometimes in times of respiratory illness or inflammation, mucus can become thickened with cell debris, bacteria, and inflammatory ...
Physiologically normal intracellular pH is most commonly between 7.0 and 7.4, though there is variability between tissues (e.g., mammalian skeletal muscle tends to have a pH i of 6.8–7.1). [4] [5] There is also pH variation across different organelles, which can span from around 4.5 to 8.0. [6] [7] pH i can be measured in a number of ...
Here's what an ENT doctor says.
The alternative to swallowing would be throat-clearing. To do this, the mouth should be closed and air should be inhaled hard into the nose. Inhaling forcefully through the nose will pull excess phlegm and nasal mucus down into the throat, where muscles in the throat and tongue can prepare to eject it.
There are glands and mucus produced by goblet cells in parts, as well as smooth muscle, elastin or cartilage. The epithelium from the nose to the bronchioles is covered in ciliated pseudostratified columnar epithelium, commonly called respiratory epithelium. [12] The cilia beat in one direction, moving mucus towards the throat where it is ...
Mucociliary clearance (MCC), mucociliary transport, or the mucociliary escalator describes the self-clearing mechanism of the airways in the respiratory system. [1] It is one of the two protective processes for the lungs in removing inhaled particles including pathogens before they can reach the delicate tissue of the lungs.
This is a great deal of fluid to move, particularly as liquids are more viscous and denser than gases, (for example water is about 850 times the density of air [52]). Any increase in the diver's metabolic activity also increases CO 2 production and the breathing rate, which is already at the limits of realistic flow rates in liquid breathing.
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