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Understanding Homeostasis and Body Fluids

Learn about the concept of homeostasis and how the body maintains equilibrium in its internal environment. Explore the role of body fluids, control mechanisms, feedback systems, and the impact of homeostasis imbalance on health. Discover ways to support your body's homeostasis process for optimal health.

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Understanding Homeostasis and Body Fluids

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  1. HOMEOSTASIS AND BODY FLUIDS BY: DR. Stella Selena M.B.B.S., DGO. Academy Director Mother Teresa Institute Of Pharmaceutical Education and Research

  2. Homeostasis: Homeo - Same • Stasis - Standstill • It is a condition of equilibrium in the body’s internal environment. • Due to constant interaction of body’s regulatory process. • Ex: Humans body keeping an average temperature of 98.6 o F • Ex: Level of glucose in blood stays between 42 and 110 mg/ 100 ml of blood pressure etc.,

  3. Blood fluids and Homeostasis: The volume and composition of body fluids is watery solution, contains dissolvedchemicals that are found inside cells as well as surrounding them. Fluid inside the cell Intra cellular fluid ICF Fluid outside the cell Extra cellular fluid ECF ECF that fills narrow space below cells of tissues known as interstitial fluid. ( inter = between ) ECF differs depending when it occurs ECF within blood vessels termed as PLASMA within Lymphatic vessels called LYMPH

  4. Control of Homeostasis: Homeostasis continually disturbed from external environment Ex: Intense heat of hot summer or Lack of O2 for a mile Reen Internal Environment Ex: Blood glucose fall to low when you skip breakfast Physiological stress in our social environment Ex: Demands of work and at school

  5. Mainly nervous system and endocrine system regulates secretes homeostasis hormones into by sending blood and regulates electric impulses homeostasis to organs and counteract the changes Both nervous system and endocrine system work through feedback system. Corrective measures are taken up by regulating systems of the body.

  6. Feedback Mechanism: Body can regulate its internal environment through feedback system. Feedback loop is a cycle of events in which the status of the body condition is monitored, evaluated and changed. Any disruption that changes a controlled condition called stimulus.

  7. Feedback system includes 3 components: Receptor Control center Effector

  8. Receptor:Structure that monitors changes in controlled condition. sends This pathway input to is called controlled centers afferrentpathway Afferrentaf: toward ferrent: carried [ since information flows towards controlled centers] For ex: Certain new endings in skin sense temperature and can detect changes like Dramatic drop in temp.

  9. Control Center: In our body the brain is control center. Evaluates the input which it receives from receptors and generate output commands when they are needed. Output from center occurs as nerve impulses or hormones other chemical signals.

  10. An Effector: Structure that receives output from control center and produces a response that changes controlled condition. When body temperature drops sharply Brain sends impulse to skeletal muscle effectors. Results in shivering, generates it the heat raises body temperature.

  11. A group of receptors and effectors communicating with control center forms feedback system regulate controlled condition in body’s internal environment by responding in a manner by giving feedback

  12. i.e., if feedbacks information to change controlled condition in some way either by inhibiting/ enhancing negative feedback / positive feedback. Negative Feedback: Reverse the changes in controlled condition. Regulation of B.P : considered as –ve feedback BP force exerted by blood as it presses against the walls of blood vessels.

  13. When heart beats faster ------- BP increases If some internal or external stimulus Causes B.P to raise

  14. Positive feedback system: Positive feedback system increases to strengthen or reinforce a change in one’s body controlled conditions

  15. In positive feedback system Response affected the controlled condition Control center still provides commands to an effector The effector produces physiological response that adds or reinforce the initial change This action continues until it interrupted by some mechanism. Ex: Child birth is a good example for +ve feedback.

  16. Homeostasis imbalance: Many factors in this balance called health include. Environment and your own behavior. Your genetic make up. Air we breathe, the food we eat and thoughts we think. The way you live your life can either support or interfere with your body’s ability to maintain Homeostasis and recover from inevitable stress life throws you way. Diseases are the result of poor health behavior.

  17. Ex: Due to smoking – related illness Tobacco exposes lung tissue To chemicals Causes cancer and damage lungs ability These diseases are difficult to treat It is much wiser to quit smoking once you are diagnosed with a lung disease. Developing a life style that works with rather than against

  18. Your body’s Homeostasis process helps to improve personal potential for optimal health. As long as body’s controlled conditions remain with in certain narrow limit. Body cells functions efficiently and Homeostasis is maintained and body stays healthy. If Haemostatic imbalance is moderate: a disease may occur If it is severe : death may result

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