Thyroid hormone acts on its target cells via because of its gene activation , hydrophobic 2nd messenger, hydrophobic gene activation , hydrophilic 2nd messenger , hydrophilic nature.
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Thyroid hormone regulates cellular processes through which of the following mechanisms? Transcriptional activation, Translational activation, Binding to a G-protein coupled receptor, Binding to a receptor-tyrosine kinase.
Keemin L.
12. Thyroid hormones include two molecules called T3 and T4. T3 consists of two tyrosine molecules plus three iodine molecules and is more abundant than T4 which consists of two tyrosine molecules plus four iodine molecules. Are carriers required for the transport of thyroid hormones? 13. a. Lipid-soluble hormones such as estrogen and testosterone hormones bind to receptors located in the cytoplasm or nucleus of the cell. b. The hormone-receptor complexes act as transcription factors. c. The receptor-hormone complex then binds to specific sites on a DNA molecule. d. This stimulates genetic transcription, resulting in new protein synthesis....which codes for the production of new enzymes that can change the metabolism of the cell.
Adi S.
The general mechanism of action of steroid and thyroid hormones is to: a. Alter membrane permeability of target cells b. Change the rate of protein synthesis by target cells c. Stimulate second messengers d. Decrease messenger RNA synthesis e. None of the above 2. Specific receptors for hormones may be: a. Located on the surface of the cell b. Intracellular or intranuclear c. Altered in quantity when low or high amount of a hormone are present d. Sensitive to a single hormone e. All of the above 3. Which of the following would not be found in the anterior pituitary? a. Prolactin b. Luteinizing hormone c. Beta-lipoprotein d. Follicle stimulating hormone e. Thyroid Stimulating hormone 4. Which of the following is not true regarding thyroid hormone? a. T4 is secreted in larger amounts than T3 b. Most of T3 is derived from T4 c. T3 is more active as a hormone than T4 d. The liver is involved in regulating thyroid hormone levels e. The target cells for thyroid hormone are exclusively located in the brain
Sri K.
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