"In strengthening a synapse you build a connection, and certain synapses are encoding a memory. Those synapses have to be strengthened so that memory is in place and stays there. Strengthening synapses is a very important part of learning. What we have found appears to be one part of how that happens." (Kenneth S. Kosik, co-director at UCSB's Neuroscience Research Institute)
Can you polish off this hamburger? How about two of them?
Better watch out. The hormone that controls your appetite, leptin, is critical - not only to your weight, your percentage of body fat, your risk of diabetes and heart attack... Now, it has been identified as a major factor in Alzheimer's disease.