The main components of high-voltage electric transmission lines and associated facilities include: Transmission towers are the most visible component of the power transmission system. Their function is to keep the high-voltage conductors (power lines) separated from their surroundings and from each other.
It is not surprising then that some of the symptoms of hyperthyroidism are nervousness, irritability, increased perspiration, heart racing, hand tremors, anxiety, difficulty sleeping, thinning of your skin, fine brittle hair and weakness in your musclesâespecially in the upper arms and thighs.
Thyroid hormones direct many of the body's processes. An underactive thyroid does not produce enough hormones. This condition is also referred to as hypothyroidism. It slows down the metabolism, which may cause fatigue, lethargy, or constipation, but these kinds of symptoms can also have a number of other causes.oo little thyroid hormone. Symptoms include weight gain, constipation, dry skin, and sensitivity to the cold. Also called underactive thyroid. PubMed Health Glossary.