the receptors would be on the plasma membraneī. knowing this, what can be concluded about estrogen receptors?Ī. ligand-gated ion channel Estrogen is a lipid soluble hormone that can easily cross membranes. 3 When a neurotransmitter released from one neuron binds to a _ on a second neuron, the neuron depolarizes and firesĭ. G-protein a subunit GTP is hydrolyzed to GDP allowing re-association of the G-protein a subunit and bg dimer A G-protein coupled receptor associates with a G protein that contains how many subunits?Į. G-protein a subunit is digest and recycled D. The G protein a subunit GTP is hydrolyzed to GDP allowing re-association of the G-protein a subunits and bg dimerĮ. it spontaneously loses activity within a few secpondsĭ. G protein a subunit containing a GTP eventually re-associates with the G protein bg dimerī. G protein loses GDP and gains GTP becoming activated Following its initial activation, how does a G protein become inactivated?Ī. insulin enters the cell through the GPCR and diffuses to the nucleus where it interacts with transcription factors D. G protein loses GDP and gains GTP becoming activatedĮ. G protein loses GTP and gains GDP becoming inactivatedĭ. G protein loses GTP and gains GDP becoming activatedĬ. G protein loses GDP and gains GTP becoming inactivatedī. enzyme-linked receptor When insulin binds to it's G-protein coupled receptor (GPCR) what happens next?Ī. most When epidermal growth factor binds to its _ the receptor phosphorylates itself, triggering a signal transduction pathwayĮ. concentration of the hormone conformational change in the receptor once bound to the hormone If the concentration of a ligand is 100 times greater than the Km of its receptor, _ of the receptors will be bound to a ligandĭ. conformational change in the receptor once bound to the hormoneĮ. signal transduction that occurs when the receptor binds the hormoneĭ. the cell response that occurs when the receptor binds the hormoneī. When considering the components of cell signaling, the action of turning the key would best correspond toĪ. they change their conformation when bound to a hormone A key is placed into a keyhole then turned and the door opens. they are all linked to protein kinase activationĮ. they associate with a protein bound to GDP or GTPĭ. they change their conformation when bound to a hormoneĬ. half of the receptors are bound to ligands What do G protein coupled, enzyme-linked, and ligand-gated ion channel receptors have in common?ī. all of the ligands are receptors are bound to each other A. all of the receptors are bound to ligandsĮ. all of the ligands are bound to receptorsĭ. half of the ligands are bound to receptorsĬ. half of the receptors are bound to ligandsī. cells release a signal that affects neighboring cells When a cell responds to a signal it sent this is an example of autocrine signaling When the concentration of a ligand is equal to the Km which of the following is true?Ī. cells release a signal that affects it and neighboring cells C. cells release a signal that affects cells at long distancesĮ. cells releases a signal that affects neighboring cellsĭ. cells bind a membrane bound signal on a neighboring cellsĬ. cells release a signal through gap junctions to affect neighboring cellsī. endocrine What do synaptic signaling and paracrine signaling have in common?Ī. Hormones are released from one cells and act on other cells in distant organs and are thus an example of _Į.
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