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.
Bone consists of two layers: a compact outer layer, called cortical bone, and a porous inner layer, called spongy (or cancellous) bone. Osteoporosis weakens mostly bones with a large percentage of spongy bone.These include the vertebrae (bones of the spine), the hips, and the wrists. Bones of this kind are more fragile and are especially prone to fracture when affected by osteoporosis.one consists of two layers: a compact outer layer, called cortical bone, and a porous inner layer, called spongy (or cancellous) bone. Osteoporosis weakens mostly bones with a large percentage of spongy bone.