Q. In order for the thyroid gland to produce thyroxin:
A. iodine must be available
B. carbohydrate molecules must be available
C. calcium levels must be low
D. iron levels must be low
Answer: iodine must be available
A. iodine must be available
B. carbohydrate molecules must be available
C. calcium levels must be low
D. iron levels must be low
Answer: iodine must be available