Please answer the following questions using complete sentences.  Please write
these complete sentences on your own paper.  The answers to these questions will
be found in the older Hallman AMSCO textbook.

1.    List the 3 major areas where water is found in our bodies and the approximate
       percentage of water in each area.   (p. 264)
2.    What is meant by the term excretion?  (p. 266)
3.    Our kidneys need to filter nitrogenous wastes from our blood.  Where do these
       nitrogenous wastes come from?  (p. 266)
4.    What is the main toxic waste produced from the breakdown of amino acids?  (p. 266)
5.    Some organisms convert poisonous ammonia into less harmful uric acid crystals
       which they remove by defecation from their digestive systems.   List three examples
       of organisms which produce this waste.  (p. 266)
6.    How do most mammals (like humans) deal with ammonia and what is the major way
       they remove it from their bodies?  (p. 267)
7.    What does the contractile vacuole do in some fresh water organisms? (p. 267)