Homeostasis And Negative Feedback Mechanisms

Homeostasis can be defined in many ways. The biological definition would be the habit of a cell to control its internal environment and maintain equilibrium or balance. In more simple way it helps bring back everything to its stable state. All the organs in the human body contributes its actions to the homeostasis system to help bring balance to the neural, thermal and chemical factors by working together in a complicated way. And that being said, all of the homeostasis are being controlled by a system called control system which is generally the brain. How does the homeostasis control work? There are 5 stages for the homeostasis system, Stimulus, Receptor, Input, Output and Response.

In the first stage the stimulus works in order to produce …show more content…
We have 2 types of homeostatic control mechanisms, The negative feedback and the positive feedback. Most of them are negative feedback. Negative Feedback Mechanism changes the variable back to its ideal value. Positive Feedback Mechanism accelerates output created by a activated stimulus. Here are some examples of homeostasis mechanisms:- 1) Regulation of the blood calcium level- If the calcium level is high in blood it causes the secretion of a polypeptide hormone called calcitonin from the thyroid …show more content…
When the heart rate is high during exercise the muscles are going to send a message through the nervous system to the medulla, after receiving the message it releases epinephrine and nor-epinephrine which are going to travel along the nervous system to reach the sinus node, which is the electrical system of heart. The node will trigger the heart's contractions. After the exercise is over the muscles will again send a message to medulla, this time the response will be releasing a hormone named acetylcholine, the hormone will slow down the rate and delays the heart