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

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