Here is a description of a few believed to play a role in depression: 1  Acetylcholine enhances memory and is involved in learning and recall. 2  Serotonin helps regulate sleep, appetite, and mood and inhibits pain. Research supports the idea that some depressed people have reduced serotonin transmission.
Osteoporosis, which means porous bone, is a disease in which the bones gradually become weak and brittle. The condition often results in broken bones, or fractures, especially of the hip, wrist, and spine, even from simple activities like lifting a chair or bending over.steoporosis, which means porous bone, is a disease in which the bones gradually become weak and brittle. The condition often results in broken bones, or fractures, especially of the hip, wrist, and spine, even from simple activities like lifting a chair or bending over.
The components of the word 'osteoporosis' literally mean 'porous bones' - 'osteo' is for bones, and 'porosis' means porous-helpfully describing this condition that results in reduced bone density and increased fragility of the bones.1. However, as we age, the rate of bone breakdown can outstrip bone-building, with a peak in bone density in the late twenties, and a gradual weakening after the age of 35 or so; in some people, this natural weakening is more pronounced, leading to osteoporosis and a higher risk of fractures. 7.