Alternative Medicine, National Center for Compleme
Alternative Medicine, National Center for Complementary &: See: National Center for Complementary & Alternative Medicine.
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- Alternative splicing
Alternative splicing: A mechanism by which different forms of mature mRNAs (messengers RNAs) are generated from the same gene. Alternative splicing is a regulatory mechanism by which variations in the incorporation of the exons, or coding regions, into mRNA leads to the production of more than one related protein, or isoform.
- Altitude illness
Altitude illness: Altitude illness (or altitude sickness) is a disorder caused by being at high altitude. It commonly occurs above 8,000 feet (2,440 meters). The cause of altitude illness is a matter of oxygen physiology. At sea level the concentration of oxygen is about 21% and the barometric pressure averages 760 mmHg. As altitude increases, […]
- Altitude sickness
Altitude sickness: Altitude sickness (or altitude illness) is a disorder caused by being at high altitude. It more commonly occurs above 8,000 feet (2,440 meters). The cause of altitude illness is a matter of oxygen physiology. At sea level the concentration of oxygen is about 21% and the barometric pressure averages 760 mmHg. As altitude […]
- Altitude, acclimatization to
Altitude, acclimatization to: The process of adapting to the decrease in oxygen concentration at a specific altitude. A number of changes must take place for the body to operate with decreased oxygen. These changes include increasing the depth of respiration; increasing the pressure in the pulmonary arteries, forcing blood into portions of the lung that […]
- Altitude, high
Altitude, high: Altitude sickness occurs at high altitude. So what is high altitude? Altitude is defined on the following scale: High altitude: 8,000 – 12,000 feet (2,438 – 3,658 meters); Very high altitude: 12,000 – 18,000 feet (3,658 – 5,487 meters); and Extremely high altitude: 18,000+ feet (5,500+ meters). Most people can go up to […]