Sprained ankle An ankle sprain is an injury the ligaments in the foot causing pain, tenderness, swelling, and bruising. Blood clot in the legs Blood clots in the leg can become very dangerous, symptoms include swelling, redness, tenderness in the leg.
serine A non-essential amino acid found as a component of most proteins. It is a precursor of choline, glucine, cysteine and pyruvate. Serine is present in most diets but most of the body serine is synthesized.
Updated May 06, 2016. The neurotransmitter serotonin (sometimes called 5-HT because of its chemical name, 5-hydroxytryptamine) is a substance that occurs naturally in your body. As a neurotransmitter, serotonin carries signals along and between nerve cells (neurons).