A patient with iodine deficiency consumes goitrogenic foods (cassava). Which feedback response most likely exacerbates thyroid enlargement?

💡 Explanation

Goitrogens inhibit thyroid hormone synthesis; because iodine is deficient, the thyroid can't produce enough T3/T4. This leads to chronically elevated TSH (thyroid-stimulating hormone) levels via negative feedback. Therefore, the thyroid enlarges (goiter) due to TSH's growth-promoting effects, rather than increased hormone production directly compensating.

• Why does affinity maturation improve vaccine effectiveness during repeated exposure to a pathogen?
• If a novel topical medication significantly disrupts keratin filament cross-linking within the stratum corneum, which consequence is most likely?
• If a long-distance runner increases mileage too rapidly, which consequence is most likely in their tibia?
• A subject undergoes sleep deprivation followed by recovery sleep. Why does REM sleep duration typically increase during recovery, particularly in the latter half of the sleep period?
• Why does a slowly applied pressure sometimes fail to trigger a touch sensation, even if the same total force, if applied quickly, would be easily detected?
• If a patient has a mutation inhibiting von Willebrand factor (vWF) secretion from endothelial cells, which consequence is most likely regarding platelet function?