Your homework for Saturday is to complete the Mice on Ice! homeostasis postlab. The data is on VC or you can download it below from slideshare. I've already done the graphs for you for times sake.
Showing posts with label homeostasis. Show all posts
Showing posts with label homeostasis. Show all posts
Friday, December 7, 2012
Tuesday, December 4, 2012
Mice on Ice!
Today in lab we explored how external stimuli such as changes in temperature (in our case cold) requires organisms to respond to restore homeostasis.
As the temperature changed (got colder) the mice had to do more cellular work (why? what is happening?) to maintain a constant body temperature. So if more cellular work is required, then more ATP must be made. What process contributes the energy needed for ATP formation?
As such what happens to the mouse's breathing rate?
We talked about the respiratory system as well and demonstrated the diaphragm and how it moves in relation to inhalation and exhalation.
As the temperature changed (got colder) the mice had to do more cellular work (why? what is happening?) to maintain a constant body temperature. So if more cellular work is required, then more ATP must be made. What process contributes the energy needed for ATP formation?
As such what happens to the mouse's breathing rate?
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| Oxygen Probe and Cage |
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| Ice setup |
We talked about the respiratory system as well and demonstrated the diaphragm and how it moves in relation to inhalation and exhalation.
Sunday, December 2, 2012
Body Temperature - Homeostasis
On Saturday we discussed homeostasis and examples feedback loops.
Negative - thermoregulation (body temperature), Insulin production in the pancreas,
Positive - Childbirth, blood clotting.
We also discussed the parts of a feedback loop (see the video below)
Receptor
Effector
Effector
Stimulus
Response
You should also have read through the link below:
Below is the video that we watched in class. The second one is another description of body temperature regulation as a negative feedback loop
Thursday, November 29, 2012
Homework for Saturday Dec 1
You're homework for saturday is to visit the wesbite Think Bank-Homeostasis and read until you get to 'Play the game'. Please take notes while you are doing so.
Feedback Loops
Our 2nd main topic of the term is Homeostasis. Homeostasis is accomplished mainly via feedback loops.
Remember that maintaining homeostasis is not JUST responding to changes to your internal and external environments. Sometimes the body needs to 'swing out' of balance to help maintain or 'get back' to homeostasis (ex. running a fever to fight infection, heart rate increasing when running). Can you think of other examples?
Below are 2 videos that explain homeostasis and give examples of the two types of loops:
Negative
Positive
Can you describe the difference between the 2 types and give examples?
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