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.
Absolute threshold - The minimum amount of stimulation needed for a person to detect the stimulus 50 percent of the time. Accommodation - The process by which the shape of an eyeâs lens adjusts to focus light from objects nearby or far away. Also: the modification of a schema as new information is incorporated. Acetylcholine - A neurotransmitter involved in muscle movement, attention, arousal, memory, and emotion.