Physiology The primary form of coisol in the plasma is that which is A Bound to albumin B Bound to transthyretin C Free in solution D Bound to coicosteroid-binding globulin (CBG) 💡 Explanation The primary form of coisol in the plasma is that which is ✓ Correct Answer: D. Bound to coicosteroid-binding globulin (CBG)