Refer to the Figure Showing the Thyroid Gland

question 156

Multiple Choice

Refer to the figure showing the thyroid gland. A person with a diet deficient in iodine can develop a goiter.At what point in the figure would the production of thyroxine be halted, and what would the consequence be?

• A) It would be halted at point 2, and thyroglobulin could not be produced.
• B) It would be halted at point 3, and thyroglobulin could not be secreted into the follicle lumen.
• C) It would be halted at point 3, and thyroglobulin would accumulate in the follicle lumen.
• D) It would be halted at point 5, and thyroglobulin could not be taken up into lysosomal vesicles.
• E) It would be halted at point 5, and thyroglobulin could not be digested into T₃ and T₄ and would accumulate in the lysosomes.

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