What color is blood?

Red?  Blue?  Most diagrams of the circulatory system are drawn in red and blue.  Red is oxygenated, blue deoxygenated.  Read the following website.  What Color is Blood in Veins?  Explain the color of blood and the misconceptions about it changing from blue to red.

Importance of Fiber in your Diet

Today we studied the digestive system.  An important part of your diet is fiber.  But fiber can not be digested.... so why do we need fiber?  Read the following article:  Are You Getting Enough Fiber?  by Mitzi Dulan. 

Why is fiber important in your diet?  What is soluble fiber?  Insoluble fiber?  How can you get more fiber in your diet?

How do you feel pain?

Scientists have found a link from your genes to how people percieve pain.  Read the article:  Gene linked to pain perception - Common genetic variant makes some people more sensitive by Laura Sanders.  

What causes us to feel pain?  What did scientists discover about people who are more sensitive to pain?  What might be a possible treatment?

Affect of Drugs on Nervous System

Today we played the nervous system game and learned how drugs affect the nervous system.  Read the following article.  Drugs and zzzzzz's - People who take the drug ecstasy are more likely to suffer from a sleeping disorder by Stephen Ornes.  How does ectasy affect our nervous system?  How can sleep apnea and the changes in nervous system caused by ectasy be related?