Acceptance Rate By Year. 1  2009-2010: 27.8%. 2  2010-2011: 22.3%. 3  2011-2012: 19.4%. 4  2012-2013: 18.4%. 5  2013-2014: 18.1%. 6  Projected JHU Acceptance Rate 2017-2018: 19.6%.
Allostasis is the process of achieving stability, or homeostasis, through physiological or behavioral change. This can be carried out by means of alteration in HPA axis hormones, the autonomic nervous system, cytokines, or a number of other systems, and is generally adaptive in the short term (McEwen & Wingfield 2003).
In biology, the term homeostasis refers to the ability of the body to maintain a stable internal environment despite changes in external conditions. The stability, or balance, that is attained is called a dynamic equilibrium; that is, as changes occur, the body works to maintain relatively uniform conditions. Controlling such things as body temperature, blood pH, and the amount of glucose in the blood are among the ways the body works to maintain homeostasis.