RNA. A type of nucleic acid consisting of nucleotide monomers with a ribose sugar and the nitrogenous bases adenine (A), cytosine (C), guanine (G), and uracil (U); usually single-stranded; functions in protein synthesis and as the genome of some viruses.
Underactive thyroid Photo Credit George Doyle/Stockbyte/Getty Images. It's hard to lose weight when your metabolism slows down, but there are things you can do. The thyroid, a butterfly-shaped gland in your throat, produces hormones that regulate many bodily functions, including metabolism.ollow a low-calorie diet. Anyone who wants to lose weight must burn more calories than are consumed. Unfortunately, for someone with an underactive thyroid, it can be difficult because the metabolism slows, meaning the body naturally burns fewer calories.
It's a small, butterfly-shaped gland that sits in your neck. It makes a hormone that helps control how you use energy. When your thyroid gland is out of whack, you're out of whack. People with an underactive thyroid are going to feel tired, Friedman says. Their cells aren't working well, they're sluggish, and their reflexes are slow.. Your doctor may test your blood for thyroid hormone to see if it's to blame for your fatigue.