Terms
A molecule transferred between neurons as a means of communication in the brain.
A type of cell found in the brain and nervous system.
Physical, mental, and behavioral changes that occur in a cycle over a 24-hour period. These rhythms regulate the sleep-wake cycle, hormone release, and body temperature, among other functions.
A “gateway” molecule that allows some substances into the cell while preventing the entry of others.
Why A Twin Study?
Twin studies are a useful tool in genetic research. Because of their close or identical genetic material, both fraternal and identical twins provide researchers with a way to determine whether the environment or genetic material has caused the exhibition of a trait. A shared trait implies genetic causes, while unshared traits usually signal environmental factors.