Endemic goiter is caused by dietary iodine deficiency. Which of the following describe how iodine deficiency affects thyroid function? Choose all correct answers. lodine deficiency causes a build up of thyroglobulin in the colloid. lodine deficiency causes levels of TSH to decrease. lodine deficiency can be treated by taking the drug propylthiouracil. lodine deficiency causes decreased production of T3 and T4. Which of the following are stimulated by Parathyroid hormone? Choose all correct answers. increased absorption of calcium from blood into the bones V increased production of vitamin D increased loss of calcium in urine increased absorption of calcium from the intestine into blood V.L. suffers from osteomalacia, a condition in which bones soften due to decreased Ca2+ mineralization.Her physician tests V.L's vitamin Dlevels and finds the following: VL's leveis Normal leveis Vitamin D 12 ng/ml 30-74 ng/mL a) What is the normal function of vitamin Din regulating serum Ca2+ levels? B Increases reabsorption of Ca2+ in the kidneys b) Assuming his body has not yet compensated for this change in Ca2+, how would V.L's vitamin D levels affect levels of serum Ca2+2 B Decreased serum Ca2+ C) How would V.L's condition affect his levels of PTH? B Decreased PTH