During childbirth, a woman is given an epidural anesthetic to relieve the pain. this is an example of what type of anesthesia?

What's the waste product of electrons and pyruvate combining in fermentation?  

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.

The most effective way to provide children with safety messages is to