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5 Cards in this Set
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Are steroid hormones hydrophobic or hydrophilic?
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Hydrophobic, synthesized from cholesterol
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Describe steroid hormone signaling
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diffuse across plasma membrane and bind to receptors that are transcription factors. Receptor is released from chaperone and dimerized, then passes through nuclear pore, associates with HAT coactivator to initiate transcription of target genes directly
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How is NO like and unlike steroid hormones?
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Both diffuse through plasma membrane, NO acts to alter the activity of target enzymes
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How is NO synthesized?
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From Argenine by NOS nitric oxide synthase
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Release of acetylcholine from nerve cells in blood vessel wall acts on endothelial cells to stimulate what?
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NO synthesis, followed by diffusion and activaiton of guanyly cyclase.
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