An endemic goiter is related to a deficiency of ________
A) calcium
B) sodium chloride
C) potassium
D) iodine
D
Explanation: A) A deficiency of calcium does not cause a goiter in the thyroid gland.
B) A deficiency of sodium chloride does not cause a goiter in the thyroid gland.
C) A deficiency of potassium does not cause a goiter in the thyroid gland.
D) Correct! An endemic goiter is caused by a deficiency of iodine in the soil.
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