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  2. Aerospace physiology - Wikipedia

    en.wikipedia.org/wiki/Aerospace_physiology

    As the barometric pressure decreases, atmospheric partial pressure decreases also. This pressure is always below 20% of the total barometric pressure. At sea level, alveolar partial pressure of oxygen is 104 mmHg, reaching 6000 meters above the sea level. This pressure will decrease up to 40 mmHg in a non-acclimated person, but in an acclimated ...

  3. Effects of high altitude on humans - Wikipedia

    en.wikipedia.org/wiki/Effects_of_high_altitude...

    The ambient air temperature is predictably affected by altitude, and this also has physiological effects on people exposed to high altitudes. The temperature effects and their mitigation are not inherently different from temperature effects from other causes, but the effects of temperature and pressure are cumulative. The temperature of the ...

  4. Armstrong limit - Wikipedia

    en.wikipedia.org/wiki/Armstrong_limit

    A pressure of 6.3 kPa—the Armstrong limit—is about 1/16 of the standard sea-level atmospheric pressure of 101.3 kilopascals (760 mmHg). At higher altitudes water vapour from ebullism will add to the decompression bubbles of nitrogen gas and cause the body tissues to swell up, though the tissues and the skin are strong enough not to burst ...

  5. What is high blood pressure and why is it called the 'silent ...

    www.aol.com/high-blood-pressure-why-called...

    High blood pressure, also called hypertension, is a vicious and smart adversary.It’s vicious because it greatly increases the odds of heart disease and stroke, some of the leading causes of ...

  6. Baroreflex - Wikipedia

    en.wikipedia.org/wiki/Baroreflex

    The sympathetic and parasympathetic branches of the autonomic nervous system have opposing effects on blood pressure. Sympathetic activation leads to an elevation of total peripheral resistance and cardiac output via increased contractility of the heart, heart rate , and arterial vasoconstriction , which tends to increase blood pressure.

  7. Blood pressure variations ‘could be warning sign of heart ...

    www.aol.com/blood-pressure-variations-could...

    High blood pressure, or hypertension, puts additional strain on the heart, blood vessels and other organs. It can increase the risk of heart attacks and stroke, as well as the likes of heart and ...

  8. A majority of young adults have high blood pressure and don't ...

    www.aol.com/lifestyle/majority-young-adults-high...

    A normal blood pressure reading is less than 120/80 mm Hg, while high blood pressure, or hypertension, is considered 130/80 mm Hg or higher, according to the American College of Cardiology and ...

  9. Altitude sickness - Wikipedia

    en.wikipedia.org/wiki/Altitude_sickness

    Cabin pressurization – Process to maintain internal air pressure in aircraft or spacecraft; Effects of high altitude on humans – Environmental effects on physiology and mental health; Mountaineering – Activity involving ascending mountains; Secondary polycythemia – Laboratory diagnosis of high hemoglobin content in blood