Feedback Systems in terms of Diabetes and Pancreas Flashcards
Homeostasis
To keep the internal environment stable
Negative feedback
When you have an internal environment that is too high or too low in something, the body will have a system in place that brings it back to a neutral level
Positive feedback
When you have a favorable thing happening inside the internal environment, and you want more of it to happen, your body uses a positive feedback to create more of that internal condition.
Give an example of positive feedback using blood clotting:
When you get a wound, your blood starts to clot a little. Your body sends a message to start creating more clots to seal the wound completely.
What is Insulin?
hormone produced in the pancreas. Its function is to allow glucose to move from the bloodstream into the cells so that they can use the glucose in cellular respiration
What is glucagon?
hormone produced in the pancreas. Its function is to take glucose that is stored in the liver and muscle and release it into the bloodstream so that the cells can use it.
Give an example of negative feedback using blood glucose:
When your body has a high blood glucose level (after you eat), your pancreas releases insulin so that the glucose can be absorbed from the blood into the cells
When you body has a low blood glucose level (after you have not eaten in a while) your pancreas releases glucagon so that the glucose stored in the liver and muscles can be released into the bloodstream.
What is diabetes? How does it affect the blood glucose level of a human?
Diabetes is when the body EITHER 1) cannot produce insulin or 2) use insulin properly. As a result the blood glucose level of a diabetic person stays high (if they are not treated medically)
Why is it bad to have diabetes?
If your blood glucose level remains high and insulin is not properly transporting glucose from the bloodstream to the cells, the cells will lack enough glucose to carry out cellular respiration
