9/26 Biology update and homework due 10/2

Hi folks,

Today we took a bit of time to cover the importance of pH and the importance of salts to living things.  That allowed us to spend a good amount of time discussing the concept of homeostasis.  Last but not least, we began our discussion of the biological molecules.

For homework this week:

Read this website regarding homeostasis and answer the following questions that can be found in the reading.

1.  What are three things cells need to survive?

2.  What is homeostasis?

3.  What is negative feedback? 

4.  What is positive feedback?  

5.  Which is more common in biological systems, positive or negative feedback?

6. Give 3 examples of negative feedback.

7.  Give an example of positive feedback.

8. Give three examples of homeostasis in mammals.

9.  What is the job of the endocrine system?

10.  What are two basic ways disease and cellular malfunction can be caused?

11.  How does nutrition play a role in homeostasis?

12.  How does physical activity play a role in homeostasis?

13.  How does mental health play a role in homeostasis?

14.  Last but not least, how about environmental exposure?


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