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).
Definition: Homeostasis is the ability to maintain a constant internal environment in response to environmental changes. It is a unifying principle of biology. The nervous and endocrine systems control homeostasis in the body through feedback mechanisms involving various organs and organ systems.