Download Owl 1038-1041 Questions

Homeostatic Feedback Systems in the Human Body
“In a feedback mechanism the last step in a series controls the first step”
Read in the Owl book pages 1038-1041 and answer the following questions
1. What is Glucagon and how it is related to Glucose (sugar)? You can use a search
engine.
2. What is an antagonistic hormone?
3. Why are Glucagon and Insulin considered antagonistic hormones? (refer to the
diagram at bottom of 1038 if you need to)
4. Read the short definition of Negative and Positive Feedback, then make a
“Diagram Definition” of each, but simply creating a diagram with the words used in
the definitions.
5. Make a diagram that shows how LH controls the amount of Estrogen released.
Use the 2 graphs at the top of 1039 for this question.
In the first graph Negative Feedback, what is it that is making the amount of
B to decrease?
In the second graph Positive Feedback, why do the lines for A and B follow
each other? (what relationship do the have to each other?)
6. LH is also found in men and helps release testosterone. Diagram this feedback
mechanism in men.
7. To regulate the Thyroid gland the hypothalamus will detect ________ levels of
Throxine (thyroid hormone that controls your metabolism). It then sends out
______________________ which will go to the Pituitary gland and stimulate it to release
_______________________ into the blood. The ___________ then stimulates the
_____________________ to produce ________________________, which then travel back to the
_________________________, which is then stimulated to stop making __________________
which stimulated the whole process to start! This is an example of ________________
feedback.