Science Quiz / Receptors and Cell Signalling and The Thyroid Gland

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Can you name the Receptors and Cell Signalling?

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QuestionAnswer
what molecule is bound to a G protein in its inactive form?
found in the apical membrane of the follicular cells and is responsible for transporting iodine from the follicular cells into the lumen of the thyroid follicle.
chemical messengers that are transported by the blood to act on target organs and cells.
enzyme responsible for the liberation of iodine and the iodination of tyrosine to produce the thyroid hormones
The release of TSH is stimulated by what?
patients with iodine deficiency have a higher or lower plasma TSH level?
This hormone acts to increase iodine uptake via NIS, activates thyroid peroxidase, increases the production of thyroglobulin, and increases the secretion of T3 and T4.
Where is TSH made? (Be specific)
thyroid hormone are formed by adding what molecule to tyrosine?
which tyrosine derived group of hormones act similar to protein/ peptide hormones
10% of circulatory T3 and T4 is bound to what protein?
an increase in basal metabolic rate is known as ______. It is regulated by Thyroid hormones.
True or False: Metabolism and Feedback Regulation are key in control of the endocrine system.
the addition of one iodine to tyrosine results in what molecule?
When there is an iodine deficiency, the total amount of thyroid hormone produced increases or decreases?
abnormal disorder of the thyroid that is characterized by decreased appetite, weight gain, cold intolerance, and decreased sweating
When there is an iodine deficiency, the percentage of T3 made increases or decreases?
Calcitonin can be found in the _______ cells of the thyroid.
catalyzes the conversion of T4 to T3
20% of circulatory T3 and T4 is bound to what protein?
TRH is made in the ______ and the _____ nuclei of the hypothalamus.
True or False: The thyroid hormone binding proteins serve to protect T3 and T4 from metabolism and excretion. They also allow for large pools of readily available hormone in the bl
True or False: Protein or peptide hormones have a short half-life
intracellular receptors for thyroid hormones are primarily bound to what?
What percentage of the ingested iodine actually makes it to the thyroid?
When there is an iodine deficiency, the percentage of T4 made increases or decreases?
this disorder occurs when the G alpha stimulatory subunt of the PTH receptor is defective and causes the patient to have hypocalcemia.
intracellular receptors for glucocorticoid and mineralcorticoid are primarily located where within a cell?
QuestionAnswer
protein/ peptide hormones are released from cells via (diffusion or exocytosis?)
True or False: During times of starvation, the biologically inactive r-T3 is produced to conserve energy stores.
hormone that arise form axon terminal instead of endocrine cells are known as _____.
Which thyroid hormone is responsible for the negative feedback regulation of TRH and TSH?
True or False: The thyroid hormones pre-dominantly travel in the blood in free form.
One possible cause of this disorder can be the binding of autoantibodies to the TSH receptor preventing the release of thyroid hormones.
a system of chemical messengers that are released into the interstitial fluid to act on itself is known as _____
The thyroid gland synthesizes T4 ___% of the time.
water soluble hormones generally bind to receptors that are located where?
True or False: T3 promotes the storage of energy.
this disorder occurs due to a defective V2 receptor in the kidney that causes an inability to retain water.
In order to maintain, normal thyroid function we must ingest how much iodine per week (in mg)?
steroid hormones are released from cells via (diffusion or exocytosis?)
lipid soluble hormones generally bind to what types of receptors?
this receptor type opens as a channel in response to ligand binding
abnormal disorder of the thyroid that is characterized by increased appetite, weight loss, heat intolerance, and increased sweating.
hyperthyroidism cause by the binding of an autoantibody to the TSH receptor.
patients with graves disease have a higher or lower plasma TSH level?
The thyroid hormones are released into circulation via what process?
which tyrosine derived group of hormones act similar to steroid hormones
True or False: The half life of T3 is longer than T4.
the addition of two iodine to tyrosine results in what molecule?
what transporter is responsible for actively moving iodine into the thyroid gland?
True or False: The thyroid hormones are made within the thyroid epithelial cells.
intracellular receptors for estrogen and progesterone are primarily located where within a cell?
70% of circulatory T3 and T4 is bound to what protein?
a system of chemical messengers that are released into the interstitial fluid to act on adjacent cells is known as _____

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