can have different affinities for multiple ligands b. each hormone will only interact with one type of receptor c. the hormone-receptor contact is generally irreversible d. most cells express receptors for all hormone
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which of the following statements best characterizes the hormone-receptor interaction?
a. receptors can have different affinities for multiple ligands
b. each hormone will only interact with one type of receptor
c. the hormone-receptor contact is generally irreversible
d. most cells express receptors for all hormone
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- Which one of the following best describes the characteristics of an autocrine hormone? Select one: а. Acts on same cells to amplify signals b. Released into bloodstream С. Acts on target cells far away from site of synthesis d. Acts on neighboring cells e. Diffuses across the synaptic junctionWhich one of the following best describes the characteristics of an autocrine hormone? Select one: a. Released into bloodstream b. Acts on neighboring cells c. Acts on same cells to amplify signals d. Acts on target cells far away from site of synthesis e. Diffuses across the synaptic junctionSelect all of the following involved in the fight or flight response: (Multiple select question) A. pupil dilation B. Increase in urine production C. increased oxygen supply to the lungs D. Increased digestion of a recent meal. E. increased heart rate, blood pressure and respiration rate.
- Which of the following is not a true statement? A.) steroid and thyroid hormone signaling would be impaired if the plasma level of carrier proteins is not optimal. B.) Steroid and thyroid hormone-receptor complexes form dimers when they bind to the hormone-response elements on DNA C.) Epinephrine uses the adenylate cyclase and the phospholipase C second messenger systems D.) signaling by a peptide hormone would be impaired if a second messenger system is not functional in the target cell E.) signaling by a steroid hormone would be hindered if the adenylated cyclase second messenger system is not functional in the target cell.Overexpression of this receptor in the cells of the adrenal gland causes Cushing's syndrome, a disease caused by the overproduction of cortisol. One strategy that scientists have employed to treat this disease is the use of small molecules that bind to, but do not activate, MC2R. This type of molecule is generically referred to as an antagonist. How can an antagonist bind to the same receptor as ACTH but not activate it? O a. The antagonist can bind covalently while ACTH binds non-covalently O b. The antagonist is only partially complimentary to the binding pocket of MC2R O The antagonist binds to ACTH and blocks it from binding to the receptor properly O d. The antagonist is the exact same structure as ACTH but since it is synthetic it doesn't work One cause of Cushing's syndrome is the inappropriate production of GPCRS in the adrenal gland that are not normally present in those cells. When these receptors are activated they result in the production of cortisol. Which statement about…Which of the following statements about polypeptide hormones is false?a. They bind to receptors located on the cell membrane.b. Most of them are lipophilic.c. They are the most abundant class of hormones.d. They normally activate second messengers.e. They bind noncovalently to receptors.
- Recently, a Gα q-coupled receptor was discovered that mediates at least some of the many activities of estrogen. At the time, this discovery generated considerable controversy, as it ran counter to what was then the understanding of how steroid hormone signaling worked. Which of the following observations might have led the investigators to suspect the existence of this newly discovered receptor? A. Activities of estrogen apparent less than 1 minute after application of the hormone B. The growth promoting activity of estrogen C. The presence of estrogen nuclear receptors in cells not previously known to respond to the hormone D. Estrogen is found in much higher concentrations in adult women than adult men E. Uptake of estrogen by target cellsWhich of the following statements is truc a. Neurotransmitters must bind to a receptor to exert an action on a cell but hormones do not have to bind to a receptor to exert an action b. The nervous system effects are longer lasting than the endocrine system c. The nervous system effects are faster to respond than the endocrine system d. The nervous system releases neurotransmitters into the bloodstream similar to how the endocrine system releases hormones into the bloodstreamConsider the following: Hormone X is released by Secretory Cell A and binds to its receptor on Target Cell 1. In response to this binding, Target Cell 1 releases Hormone Y. Based on the information above, identify whether the following statement is true or false: Hormone X is considered a tropic hormone. a. True b. False
- Give 3 examples of a hormone and provide the following information of each hormone: a. where is the hormone produced? b. target organ of the hormone c. function of hormoneWhich statement correctly identifies how a lipid-soluble hormone that diffuses from the blood and through the interstitial fluid identifies which cells in the tissue to act upon? O The cell closest to the diffusion site. O The presence of a receptor located in the cytoplasm or nucleus specific to the hormone in cells. O The presence of a receptor embedded in the plasma membrane of target cells. O The presence of a channel protein embedded in the plasma membrane for the lipid-soluble hormone to diffuse through. Save for Later 80 F3 F4 F5 F6 8 F7 Attempts: 0 of 3 used F8 F9 Submit Answer F10Define the following terms: a. downregulation b. tropic hormone c. G protein-coupled receptor d. G protein e. cAMP