Unit Two: Homestasis

Question 1

Homeostasis:

Answer 1

Is the maintenance of a constant internal environment

Question 2

Six things need to be controlled:

Answer 2

Temperature 
Water content-too much water could move in and out of cells and damage them 
Ion content-"          "
Blood sugar 
Carbon dioxide-toxic in high quantities 
Urea

Question 3

What are the three main roles of the kidneys?

Answer 3

Removal of urea
Adjustments of ions in the blood
Adjustments of water content in the blood