Functioning of the digestive tract may retard, bringing about problems with swallowing and digestion. 2. ... Levadopa is a chemical located in plants and animals that can be transformed into dopamine by nerve cells in the brain. ... Gene therapy offers a gene that would permit cells to make a messenger chemical that would pacify the cells. ... There is another recent, controversial research currently being investigated, which is based on using embryonic stem cells, which are undifferentiated cells derived from days-old embryos. ... Similarly, scientists believe that adult stem cells, which a...

• Word Count: 1023
• Approx Pages: 4
• Grade Level: High School

The brain is made up of many cells, and is the control centre of the body. ... It is mainly made up of cell bodies of neurons called grey matter. ... It controls such functions as breathing, blood pressure, swallowing and heart rate. ... Artificial seeing is achieved by planting sixty-four small electrodes in front of the visual cortex of the brain. ... First a electrodes must be planted in the brain. ...

• Word Count: 2017
• Approx Pages: 8
• Grade Level: High School

Erowid.org is an online library of information about psychoactive plants and chemicals. According to Sound Medicine, a chemical in the brain, adenosine, controls brain cell activity. Upon introduction to the human body, caffeine interferes with the function of adenosine, and prevents the brain from slowing down. ... According to Sound Medicine, a chemical in the brain, adenosine, controls brain cell activity. Upon introduction to the human body, caffeine interferes with the function of adenosine, and prevents the brain from slowing down. ...

• Word Count: 1264
• Approx Pages: 5
• Has Bibliography
• Grade Level: High School