Friday, March 27, 2009

Stem Cells (Take 2)

Since our previous blog, my opinions of stem cell use has not changed. I still believe that its okay to use embryonic stem cells. Most people believe that its immoral but for the embryos that are already donated, they're going to be thrown out anyways. So, might as well use the stem cells for people who need them. If these cells are able to help with certain diseases and made people more healthy, why shouldn't we use them? It just seems so logical. I also believe that the use of adult stem cells is good too. These pre-determined stem cells can help patients organs function properly. What's so immoral about curing a person of a disease or bad organ? Stem cells are of good use.

Thursday, March 26, 2009

Homeostasis

In the morning when you wake up, one of the physical changes that you go through is the movement of muscles. When you try to grip something really hard, you can't because your muscles are still "asleep." Also, your breathing changes when you get up to quickly and walk around fast. It speeds up to circulate all of the blood. The organ systems that are involved is the nervous system, muscular system, and circulatory system. You're nerves let your brain know when something in your body needs to be fixed or cared for at the moment. The feedback loops that are included in maintaining homeostasis and tending to wounds are positive and negative feedback loops. Negative feedback loops maintain homeostasis and positive feedback loops immediately tend to cuts and burns for permanent fixing while negative feedback in tending to homeostasis fluctuates.