30 Questions
Which type of cell in the thyroid follicle releases calcitonin?
Parafollicular cells
What is the primary component of the colloid within the thyroid follicle?
Thyroglobulin
Where does the production of the active form of T3 occur?
Liver or kidneys
Which of the following is a function of thyroid hormones?
Control of oxygen consumption
What is thyroglobulin considered as?
A prohormone
What percentage of T4 is transported by TBG?
70-75%
What is the active form of T3 and T4?
Free forms
What is the primary cause of thyrotoxicosis?
High levels of free thyroid hormones
What is the primary secretory product of the thyroid gland?
T4
What is the best test for Grave's disease?
TSH antibody test
What is characterized by the thyroid turning into a stony or woody mass?
Riedel's Thyroiditis
What is the term for decreased levels of thyroid hormones?
Hypothyroidism
What is the primary function of the RAIU test?
To measure the ability of the thyroid gland to trap Iodine
What is the purpose of the Thyroglobulin Assay test?
To diagnose thyroid gland cancer
What is the relationship between TBG and T3 uptake?
Inversely related
What is the primary function of the Parathyroid gland?
To regulate the levels of calcium in the blood
What is the purpose of the FTI test?
To indirectly assess the level of free T4 in the blood
What is the typical number of parathyroid glands found in most people?
4
What is the primary problem in secondary hypothyroidism?
Low secretion of TSH from the pituitary gland
What is the best test to evaluate whether TSH elevation is drug-induced or hypothyroidism?
Free T3/Free T4 test
What type of hypothyroidism is caused by a defect in the development or function of the thyroid gland?
Congenital hypothyroidism
What is the function of the TRH stimulation test?
To evaluate the relationship between TRH and TSH
What is the most clinically sensitive assay for the detection of primary thyroid disorders?
TSH or Thyroid Stimulating Hormone test
What is subclinical hypothyroidism characterized by?
Normal thyroid gland function but abnormal T3 and T4 levels
What type of gland is the thyroid gland?
Ductless gland
What is the function of thyrotroph cells in the anterior pituitary gland?
To release thyrotrophic hormone (TSH)
What is the fundamental structural unit of the thyroid gland?
Follicle
What type of hormones are classified as lipid molecules?
Steroid
What is the term for the process by which hormones are regulated?
Negative feedback mechanism
What is the location of the parathyroid gland?
Within the thyroid gland
Learn about thyroid function tests, including the parathyroid and pancreas. Understand the concept of endocrine glands, hormones, and their regulation mechanisms.
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