KIN 2504 Chapter : Kin 2504 Chapter 2 Understanding Fitness Principles
15 Mar 2019
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Life is easier without a lot of changes to deal with. Homeostasis and the organization of the animal body. One of the characteristics of life is that organisms establish and maintain an internal environment. Homeostasis - tendency of life to try and maintain the structure and regulate the. This maintenance of an internal environment is a dynamic process which require continual regulation (and energy) Negative feedback - a change in one direction causes a series of events in the other direction to counteract the change (see fig 31-2). Biological example: maintenance of body temperature at 98. 6 of. (37 oc. ) Drop in temp turns on heat, until it reaches set point, then stops. Three components of negative feedback: set point, sensor, effector. There are many similar negative feedbacks in the body (water loss, blood sugar) Positive feedback - initial change in one direction sets off a series of events that intensifies a change in that same direction.
