MAPK/ERK pathway. The MAPK/ERK pathway (also known as the Ras-Raf-MEK-ERK pathway) is a chain of proteins in the cell that communicates a signal from a receptor on the surface of the cell to the DNA in the nucleus of the cell.
Acclimatization or acclimatisation (also called acclimation or acclimatation) is the process in which an individual organism adjusts to a change in its environment (such as a change in altitude, temperature, humidity, photoperiod, or pH), allowing it to maintain performance across a range of environmental conditions.
Acclimatization. 1  The depth of respiration increases. 2  Pressure in pulmonary arteries is increased, forcing blood into portions of the lung which are normally not used during sea level breathing. 3  The body produces more red blood cells to carry oxygen, 4  The body produces more of a particular enzyme that facilitates.