Homeostasis Essay

1630 words - 7 pages

In our body’s we have thousands upon thousands of cells that work together to maintain the whole structure. Although cells accomplish different roles, they all are comparable in their metabolic conditions. Preserving a continuous inner environment with what the cells require to survive like sugar, minerals, oxygen and waste removal is essential for the cells and host well-being. The diverse process that the body controls its inner environment are referred to as homeostasis. Homeostasis refers to maintaining a stable environment in reaction to environmental changes. The body’s inner environment requires constant observation to maintain a stable inner environment this way if conditions ...view middle of the document...

This can happen in two ways; the cell does not get what it needs or gets toxins it doesn’t need. When homeostasis is communicated about the problem then pathways are sent to correct or degrade the process.
One of the ways that homeostasis maintains the body’s system is with negative and positive feedback. The control center receives a message from the body that there has been a change in the internal environment. The adjustment of blood pressure, heart rate, and temperature are found in negative feedback.
For example, the body temperature is approximately 98 degrees. If this temperature increases due to exercise the body will begin to cool down. In the skin there are receptors that will communicate this information to the control center and then the effector will initiate the response to the commands of the brain to release sweat and allow blood vessels to return to their normal state.
Homeostasis is maintained in certain ways with the body that we’re not aware of. Like in the sugar levels in your blood the body is working to maintain a steady level of glucose. When the body absorbs food containing a large amount of sugar it will communicate to the body for it to release a hormone called insulin that will absorb the glucose by the pancreas this process will help return the blood to normal.
Positive feedback is the opposite of negative feedback, it tells the body when changes occur and activates the system to increase the change. This can produce the opposite effect and could be a threat but, can also aid homeostasis. A benefit effect would be in regards to a blood clot that produces an enzyme like thrombin that help clot the blood. It has an accelerating effect so that once the clotting begins, it will run faster until it stops. This is a positive feedback look which is part of a larger negative feedback. This is triggered by the bleeding and then works to stop it.
When woman is in childbirth and the uterus expands it triggers a positive feedback from the secretion of a hormone oxytocin. This hormone fuels contraction and speeds up the labor. Another positive feedback is seen in the protein digestion, the proteins in the stomach activates the secretion of hydrochloric acid and pepsin, the enzyme that digests protein. Once this procedure begins, it becomes an accelerating process. In the development of the fetus it is crucial for the mother to get vitamins and maintain a healthy diet. Without a healthy diet the child could be born with malnutrition issues.
Positive feedback can produce the opposite of homeostasis which can potentially cause fatal consequences by rapid loss of internal stability. An example, of this is when a person has a heart attack. If a small portion of the hearts tissue is damaged this will trigger the heart to pump an insufficient amount of blood. This causes the heart muscle to be deprived of blood flow, and can trigger more tissue damage. Cardiac function will rapidly worsen until a person dies. A...

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