43. Endocrine System
Endocrine System
Multiple Choice
Multiple ChoiceA goiter may form because __________.
A
the thyroid cannot release T3 and T4 so the hormones build up in the gland
B
low blood levels of T3 and T4 inhibit the negative feedback loop and an overload of TRH causes enlargement of the gland
C
there is too much iodine in the diet
D
of none of the listed reasons
E
low blood levels of T3 and T4 inhibit the negative feedback loop and an overload of TSH causes enlargement of the gland
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