Blood Test Results for Patient A  
                                 Patient A                                    Normal Range
 Thyroxine Levels        0.6 ug/dl                                    4.6 - 12 ug/dl
 TSH Levels                6.9 mcU/mL                                0.4 - 4.2 mcU/mL
a. Identify the gland(s) that is(are) causing this condition in Patient A. Explain what is happening.
b. Name the condition that might cause this hormonal imbalance. List two symptoms.