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.
This system controls your body's metabolism. One of the thyroid's primary responsibilities is to manage your metabolism by producing two thyroid hormones: T3 and T4. An overactive thyroid can cause weight loss, a quick heartbeat, and other signs that your body is on the go a little too much. The opposite, an underactive thyroid, leaves people feeling sluggish, and causes weight gain and slow heartbeat. Essentially, your body's normal equilibrium slows down.