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A Feedback Loop Is A Response Mechanism That Influences The Continued Activity Of That System

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Case study 1
A feedback loop is a response mechanism that influences the continued activity of that system, maintaining a stable internal environment, called homeostasis. This is achieved by the control of biological reactions, in which the output forms the input of a new reaction, and eventually links to form a loop.
A feedback loop consists of three basic components: the control center, the receptors and the effectors.
When the body is undergoing perturbation, an assortment of specialized cells known as the receptors detect stimuli. The stimuli are hence processed into electrical impulses that are inputted to the control center through the Nervous System. At the control center, the input is analyzed and a decision is made as to how the
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This detection is inputted to the brain as electrical impulses where the sensation of thirst is then outputted. Once water has been consumed, the system stabilizes again.
This process falls under the Negative feedback category because it is working to diminish obstruction of an essential set point-which in this case is the body’s water ratio.
In other respects, Positive feedback can be identified in the process of child birth because the cycle is being amplified to reach the child’s birth.
The process begins with the child’s head which pushes against the Cervix. The stretch receptors in the Cervix detect stimuli and input the detection to the brain. The brain then triggers a secretion of Oxytocin from the Pituitary Glands. This hormone is delivered to the Uterus where it stimulates uterine contractions which thus again push the baby towards the Cervix. Once the baby has been successfully pushed through, the system seizes to an end.
This process highlights the vitality of positive feedback to not only preserve life, but to create it.
Many feedback systems can even overlap one another, such as the production of Progesterone which is composed of two negative feedback loops. The first loop, or Luteal Phase, maintains the initial creation of Progesterone by a set point of at least < 2 ng/ml.
It begins with the Hypothalamus which releases a Gonadatrophin-releasing-hormone (GnRH). The GnRH stimulates the anterior
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