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.
When you acclimate yourself to a situation, you become used to it. It usually means getting accustomed to a particular new climate, but it can also mean getting used to other situations, such as a new school. The word climate in the word acclimate should give you a clue as to the word's meaning: to get used to a specific climate. Nature allows the human body to acclimate itself to various weather conditions. For example, people moving to higher altitudes will develop more red blood cells in order to absorb oxygen better.