Thyroid hormones which causes the thyroid to enlarge (the resulting medical condition is called "endemic colloid goitre"; see goitre). This has the effect of increasing the thyroid's ability to trap more iodide, compensating for the iodine deficiency and allowing it to produce adequate amounts of thyroid hormone. Most of the thyroid hormone circulating in the blood is bound to "transport protein"s. Only a very small fraction of the circulating hormone is free (unbound) and biologically active, hence measuring concentrations of free thyroid hormones is of great diagnostic value. When thyroid hormone is bound, it is not active, so the amount of free
The Trace (Land Between the Lakes) The Trace (Land Between the Lakes) The Woodlands Trace National Scenic Byway, also known as "The Trace," is the major north–south roadway that traverses the Land Between the Lakes National Recreation Area in two counties in western Kentucky and northwestern Stewart County in northwest Middle Tennessee. It is estimated to be in length. The road is part of the National Scenic Byway system. Although it is not signed, it is listed on LBL's road logs as FD-100. The road is called "The Trace", which is what many roads and paths were called in pioneer times. "Trace" is short for "Buffalo