9/30 Biology class and homework due 10/7

Hi folks,

Today we discussed a bit of homeostasis and positive and negative feedback loops.  We also scratched the surface of the 4 major biological molecules. We will spend quite a bit more time on that next class.

There will be no quiz next week but I HIGHLY recommend taking that time to really nail down those prefixes and suffixes, the fuctional groups and memorize the other material we've covered up to now.  Don't worry too much about about today's molecule table yet.  We will be spending a lot more time with this in the next couple of weeks as we really add quite a bit of material to today's skeleton of a table.

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?