The Principles Of Homeostasis And The Contribution Of The...

This essay aims to describe the principles of homeostasis, and the contribution of the cardiovascular system to homeostasis. Using the example of congestive heart failure (CHF), the causes and the consequences of a homeostatic imbalance in cardiac output will be explained. Homeostatic principles Homeostasis can generally be defined as the condition in which the body’s internal environment remains relatively constant within physiological limits [1]. This type of equilibrium is dynamic as the body is constantly subject to stimuli, which produce stress responses (stressors). The body’s homeostatic mechanisms therefore act to counter these stressors and return equilibrium within narrow limits that allow the body to maintain life. A key function of every body system is preserving a constant internal environment, which involves maintaining the volume of body fluid. To ensure that body cells function well, homeostasis is required to regulate the composition of extracellular fluid (ECF), for example ECF within blood vessels is blood plasma; in the brain and spinal cord this is cerebrospinal fluid. One third of body water is in the ECF [2], which constitutes the body’s ‘internal environment’. The precise regulation of substances such as glucose, oxyg en, ions and waste such as carbon dioxide is essential to ensure that cells are subject to conditions that are optimum for life. The stressors that the body could be exposed to can either originate from the internal or externalShow MoreRelatedPagbabago Ng Klima8154 Words   |  33 PagesPRESENTATION AND ANALYSIS A. B. C. D. E. F. III. SUMMARY IV. CONCLUSION V. RECOMMENDATION VI. BIBLIOGRAPHY ACKNOWLEDGEMENT This term paper was made into reality with the support of some important people who gave the researcher invaluable contributions, guidance, support, and encouragement which served as his strength and will to pursue this endeavor; To ___________, my instructor in this subject for his suggestions, encouragement, and assistance in making this requirement a presentable one;Read MorePsychology Workbook Essay22836 Words   |  92 Pages retrieved and transformed using â€Å"mental programs†, with the results being behavioral responses. Evolutionary psychology-is focused on the study of how evolution explains physiological processes. Psychologists and researchers take the basic principles of evolution, including natural selection, and apply them to psychological phenomena. This perspective suggests that these mental processes exist because they serve an evolutionary purpose – they aid in survival and reproduction. BiologicalRead MoreNU 545 Unit 2 Essay10921 Words   |  44 Pagesnuclei within brainstem that maintains wakefulness and works in conjunction with the cerebral cortex and together they are known as the reticular activating system. P. 454 - 3 parts of the brain: forebrain, midbrain, hindbrain - Expression of affect (emotional and behavioral states) is mediated by extensive connections with the limbic system and prefrontal cortex. - p. 456 The prefrontal area is responsible for goal oriented behavior (ability to concentrate), short term memory and elaboration