f juvenile hormone production continued throughout an insect’s life, what would be the result? a. All of the events described here. b. The pupa stage would not occur c. Caspases would not be activated d. Inhibition of Imaginal disc cell activation
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- In general, when do hormones produce "organizing” effects? a. temporarily at any time in life b. whenever the levels of some other hormone have decreased c. during early stages in development d. during adulthood Movement of the head is detected by and communicated to the brain by which system? a. Facial system b. Auditory system c. Cranial system d. Vestibular systemWhat casuses a cell to be sensative to particular hormone? A. all cells are exposed to the endocrine signals so they are all sensivtive to it B.the presense of receptors for that hormone c. the shorter the distance between the source cell and the target cell, the more sensitive the target cell is to the hormone.What happens when an agonist, instead of the endogenous (natural) hormone, binds to the hormone receptors of a target cell? a. The agonist blocks any response in the target cell b. Transcription factors are blocked from binding to the promotor region c. An antagonist is necessary to remove the agonist d. The cell responds by producing its own hormone e. The agonist has the same effect as the endogenous hormone
- What is the function of the hormone erythropoietin? a. stimulates production of red blood cells b. stimulates muscle growth c. causes the fight-or-flight response d. causes testosterone productionPredict some consequences of trying to use a skin patch to administerinsulin, a protein hormone, to a person who has diabetes mellituswhat happens when an agonist, instead of the endogenous (natural) hormone binds to the hormone recepters of a target. A. an antagonist is necessary to remove the agonist B. the agonist blockd any response in the target cell C. the cell responds by producing its own hormone D. transcription factors are blocked from binding to the promotor region E. the agonist has the same effect as the endogenous hormone.
- Amplification of a chemical signal occurs when? a. phosphorylation of proteins by protein kinase receptors is balanced by the immediate removal of phosphate groups by phosphatases b. a receptor in the plasma membrane activates several “first messenger” molecules while a signal molecule is bound to it c. a cAMP molecule activates one protein kinase molecule before being converted to AMP d. a receptor activates a single first messenger and a single second messengerA new antagonist molecule has been discovered that binds to and blocks plasma membrane receptors. What effect will this antagonist have on testosterone, a steroid hormone? a. It will block testosterone from binding to its receptor. b. It will block testosterone from activating cAMP signaling. c. It will increase testosterone-mediated signaling. d. It will not affect testosterone-mediated signaling.Which of these is not a means by which hormones are eliminatedfrom the circulatory system?a. excreted into urine or bileb. bound to binding proteinsc. enzymatically degraded in the blood (metabolism)d. actively transported into cellse. conjugated with sulfate or glucuronic acid
- How are peptide hormones transported in the bloodstream? A. Peptide hormones are hydrophobic and need a hydrophilic transport protein to help them be transported in the blood B. Peptide are are soluble in , and can be transported without modification C. Peptide hormones are hydrophobic are soluble in plasma, and can be transported with modification D. Peptide hormones are hydrophilic and need a hydrophilic transport protein to help them transported in the blood.How might stress to a pregnant rat alter the sexual orientation of her male offspring? a. Stress increases synthesis of the neurotransmitter acetylcholine. b. Stress decreases synthesis of alpha-fetoprotein. c. Stress increases the release of endorphins in the hypothalamus. d. Stress decreases the release of corticosterone or cortisol from the adrenal glandswhat happens to a water souble hormone after it binds to a receptor on the target cell? select all that apply A. the hormone unbinds the receptor or pops back off B. the hormone is broken down by an enzyme C. the hormone is transported into the cell where it is destroyed by enzymes d. the hormones is transported into the cell where it promotes transcription.