Does any one know of a good physiology experiment that I can perform?

Question

I need to come up with this experiment so that I can perform it and then give an oral presentation. I need something that I can compare it to.

Answer 1

effect of electricty on skeletal muscle (frog rectus abdominus) draw curve on chymograph
or maybe measuring packed cell volume (pcv) in a certain amount of blood with anticoagulant
or Progesterone in milk at http://advan.physiology.org/cgi/content/full/28/2/64