منابع مشابه
High-altitude hypoxia and preeclampsia.
The influence of hypoxia (lowered arterial blood and/or tissue PO2) on fetoplacental development and the role of hypoxia in preeclampsia are major research foci in perinatal biology. While animal and cell models are of utility, we do not know whether artificial hypoxic stimuli mimic the pathological conditions attributed to hypoxic stress in vivo; we cannot distinguish the effects of hypoxia fr...
متن کاملDevelopmental responses to high altitude hypoxia.
From a review of published literature on developmental responses to high altitude, three major conclusions are derived. First, the small birth weight of high altitude native populations are adaptive responses to reduce the oxygen requirements, while the relative increase in the placental weight is a compromise mechanism to increase the volume and surface area €or a better oxygenation. Second, t...
متن کاملDevelopmental adaptation to high altitude hypoxia.
Experimental studies on animals and humans exposed to hypoxic stress have been reviewed. These data suggest that the influence of hypoxic stress, and the organism's response to it, are greater during growth than during adulthood. The organism's responses include alterations in the quantity and size of the alveolar units of the lungs, enlargement of the right ventricle of the heart, slower somat...
متن کاملTibetan and Andean patterns of adaptation to high-altitude hypoxia.
Understanding the workings of the evolutionary process in contemporary humans requires linking the evolutionary history of traits with their current genetics and biology. Unusual environments provide natural experimental settings to investigate evolution and adaptation. The example of high-altitude hypoxia illustrates some of the progress and many of the remaining challenges for studies of evol...
متن کاملTransthoracic electrical impedance in cases of high-altitude hypoxia.
Changes in transthoracic electrical impedance (T.E.I.) due to high-altitude hypoxia (3,658 m) have been measured in 20 young, healthy Indian soldiers. They were first studied at sea level (198 m) and then rapidly transported by air to 3,658 m, where they were studied daily from day 1 to day 5 and then on days 8 and 10. The mean (+/-S.D.) T.E.I. at sea level (34.6+/-0.6Omega) fell sharply to 29....
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ژورنال
عنوان ژورنال: World Chinese Journal of Digestology
سال: 2009
ISSN: 2219-2859
DOI: 10.11569/wcjd.v17.i21.2171