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Homeostasis
Homeostasis (pronounced: ho·me·o·sta·sis /ˌhoʊmiəˈsteɪsɪs/) is a fundamental concept in the field of biology and physiology. The term originates from the Greek words 'homeo,' meaning similar, and 'stasis,' meaning stable.
Homeostasis refers to the ability of an organism or system to maintain stable internal conditions necessary for survival, despite changes in external environments. This process involves a complex system of biological mechanisms that work together to keep the body's internal environment within a narrow range.
Mechanisms of Homeostasis
Homeostasis is maintained through a series of feedback mechanisms. These mechanisms involve various organs and organ systems that work together to maintain balance in the body. The two primary types of feedback mechanisms are positive feedback and negative feedback.
Negative Feedback
Negative feedback mechanisms work to counteract changes in the body's internal environment. When a change is detected, the body responds by initiating processes to restore the system back to its normal state.
Positive Feedback
Positive feedback mechanisms amplify changes in the body's internal environment. These mechanisms are less common than negative feedback mechanisms and are typically involved in processes that need to be pushed to completion, such as childbirth or blood clotting.
Role in Health and Disease
Homeostasis plays a crucial role in maintaining health. Disruptions in homeostasis can lead to the development of various diseases and disorders, including diabetes, hypertension, and autoimmune diseases.
See Also
References
External links
- Medical encyclopedia article on Home
- Wikipedia's article - Home
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