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Questions and Answers
What enzyme promotes the oxidation of iodine in the formation of iodine capable of combining with tyrosine?
What enzyme promotes the oxidation of iodine in the formation of iodine capable of combining with tyrosine?
- Thyroid peroxidase (correct)
- Lipase
- Amylase
- Insulinase
What is the process of binding iodine with the thyroglobulin molecule called?
What is the process of binding iodine with the thyroglobulin molecule called?
- Tyrosination
- Organification (correct)
- Iodination
- Thyroxination
Which molecule contains up to 30 thyroxine molecules and a few triiodothyronine molecules?
Which molecule contains up to 30 thyroxine molecules and a few triiodothyronine molecules?
- Thyroglobulin (correct)
- Thyroid peroxidase
- Thyronine
- Insulin
What is the first step in the iodization of tyrosine during the process of iodination and coupling?
What is the first step in the iodization of tyrosine during the process of iodination and coupling?
What molecule is responsible for the 'organification' of the thyroglobulin with iodine?
What molecule is responsible for the 'organification' of the thyroglobulin with iodine?
What substance accompanies thyroid peroxidase in promoting the oxidation of iodide ions to iodine?
What substance accompanies thyroid peroxidase in promoting the oxidation of iodide ions to iodine?
Which hormones are commonly known as T4 and T3?
Which hormones are commonly known as T4 and T3?
What happens to the basal metabolic rate (BMR) when there is a complete lack of thyroid secretion?
What happens to the basal metabolic rate (BMR) when there is a complete lack of thyroid secretion?
Which hormone controls thyroid secretion primarily?
Which hormone controls thyroid secretion primarily?
What percentage of metabolically active hormones secreted by the thyroid gland is thyroxine?
What percentage of metabolically active hormones secreted by the thyroid gland is thyroxine?
What is the primary function of triiodothyronine (T3) and thyroxine (T4)?
What is the primary function of triiodothyronine (T3) and thyroxine (T4)?
Which hormone is also secreted by the thyroid gland apart from T3 and T4?
Which hormone is also secreted by the thyroid gland apart from T3 and T4?
What is the main effect of thyroid hormones on gene transcription?
What is the main effect of thyroid hormones on gene transcription?
How does thyroid hormone affect glucose metabolism?
How does thyroid hormone affect glucose metabolism?
Which of the following statements about fat metabolism under thyroid hormone influence is correct?
Which of the following statements about fat metabolism under thyroid hormone influence is correct?
What is the result of the overall increase in cellular metabolic enzymes caused by thyroid hormone?
What is the result of the overall increase in cellular metabolic enzymes caused by thyroid hormone?
Why are thyroid hormones released slowly to tissue cells?
Why are thyroid hormones released slowly to tissue cells?
How does the effect of thyroid hormone on carbohydrate metabolism impact insulin secretion?
How does the effect of thyroid hormone on carbohydrate metabolism impact insulin secretion?
What effect does increased thyroid hormone have on the concentrations of cholesterol, phospholipids, and triglycerides in the plasma?
What effect does increased thyroid hormone have on the concentrations of cholesterol, phospholipids, and triglycerides in the plasma?
What is the primary role of lipids when they are mobilized rapidly from fat tissue?
What is the primary role of lipids when they are mobilized rapidly from fat tissue?
How does hyperthyroidism typically affect the size of the thyroid gland in patients?
How does hyperthyroidism typically affect the size of the thyroid gland in patients?
Which protein has the highest binding strength for thyroxine transport in the blood?
Which protein has the highest binding strength for thyroxine transport in the blood?
What effect does increased thyroid hormone have on the size of the thyroid gland?
What effect does increased thyroid hormone have on the size of the thyroid gland?
What physiological consequence results from the rapid mobilization of lipids from fat tissue?
What physiological consequence results from the rapid mobilization of lipids from fat tissue?
What is the underlying cause of hyperthyroidism in Graves' disease?
What is the underlying cause of hyperthyroidism in Graves' disease?
What do thyroid-stimulating immunoglobulins (TSIs) do in individuals with Graves' disease?
What do thyroid-stimulating immunoglobulins (TSIs) do in individuals with Graves' disease?
How does Graves' disease affect the size of the thyroid gland?
How does Graves' disease affect the size of the thyroid gland?
What is a common symptom associated with a goiter?
What is a common symptom associated with a goiter?
What do radioactive iodine uptake studies indicate in hyperplastic glands?
What do radioactive iodine uptake studies indicate in hyperplastic glands?
In Graves' disease, what role do TSIs play in the production of thyroid hormones?
In Graves' disease, what role do TSIs play in the production of thyroid hormones?
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