Medical Quiz

Thyroid and Intro to Endocrinology Quiz


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Synthesized and stored within the cell in the form of secretory granules and are cleaved as needed

A. Peptides and Proteins

B. Amines

C. Steroids

D. None of the above


Secreted in one location and release into blood circulation; binds to specific receptor to elicit physiological response

A. Endocrine

B. Paracrine

C. Exocrine

D. Juxtacrine


Peripheral monodeiodination of T4 produces how much additional T3?

A. 25 mg

B. 25 mcg

C. 15 mg

D. 5 mcg


Amount of T4 the thyroid secrete per day

A. 80 mg

B. 80 mcg

C. 5 mg

D. 5 mcg


Decreased thyroid secretion greatly increases the plasma levels of cholesterol, phospholipids, and triglycerides

A. TRUE

B. FALSE


Major stimulus of growth hormone secretion

A. Sleep

B. Somatostatin

C. Fasting and High protein diet

D. Levodopa


The basal membrane of the thyroid cell has the specific ability to pump the iodide actively to the interior of the cell

A. Iodide trapping

B. Iodine trapping

C. Iodinization

D. Deiodinization


Screening test for growth hormone deficiency

A. Physical activity test/Exercise

B. Insulin Tolerance Test

C. Arginine stimulation test

D. 24 hour serum GH levels


Conversion of T4 to T3 takes mainly in the liver and _____

A. Kidneys

B. Placenta

C. Peripheral adipose tissues

D. Gastrointestinal lining


Are lipid molecules that have cholesterol as a common precursor

A. Steroids

B. Amines

C. Peptides and Proteins


Secreted in endocrine cells and remains in relation to plasma membrane; acts on immediately adjacent cell by direct cell-to-cell contact

A. Juxtacrine

B. Endocrine

C. Paracrine

D. Exocrine


Which of the following inactivates thyroid hormone?

A. D1

B. D2

C. D3

D. D4


Secreted in the neurons and released into extracellular space; binds to receptor in nearby cell and affects its function.

A. Neuroendocrine

B. Endocrine

C. Exocrine

D. Neurocrine


Which of the following produces Calcitonin?

A. Parafollicular cells

B. Colloid

C. Parathyroid gland

D. Pendrin


Minimum daily requirement of Iodine in the diet

A. 75 mcg

B. 15 mg

C. 15 mcg

D. 15 g


Confirmatory test for Acromegaly

A. Glucose Suppression Test

B. Arginine Stimulation Test

C. Insulin Tolerance Test

D. Serum IGF 1 levels


A system in which an increased in the product also increased the activity of the system and the production rate

A. Positive Feedback Mechanism

B. Negative Feedback Mechanism


The major constituent of colloid is the large glycoprotein called ________

A. Thyroglobulin

B. Albumin

C. Thyroxine binding globulin

D. Thyrpoeroxidase


They are water insoluble (hydrophobic) and circulate bound to a carrier protein

A. Steroids

B. Amines

C. Peptides and Proteins

D. None of the above


Process wherein tyrosine residues are iodinated by iodine

A. Organification

B. Iodide trapping

C. Deiodinization

D. Iodinizarion


Increased thyroid hormone decreases the levels of cholesterol, phospholipids, and triglycerides in the plasma, and increases the free fatty acids

A. TRUE

B. FALSE


Transthyretin is also called as

A. Pre Albumin

B. Thyroxine binding globulin

C. Albumin

D. Ceruloplasmin


Gold standard for diagnosing Growth Hormone deficiency

A. Insulin Tolerance Test

B. Arginine Stimulation Test

C. Physical Activity Test

D. 75 g OGTT


Lack of thyroid hormone during development results in short stature and mental deficits

A. Cretinism

B. Hashimoto’s thyroiditis

C. Thyroid Storm

D. Acromegaly


A system in which an increased in the product decreases the activity of the system and the production rate

A. Positive Feedback Mechanism

B. Negative Feedback Mechanism




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