Principles of Biology

Biology

Quiz 8 :
Cell Communication

Quiz 8 :
Cell Communication

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The process through which cells can detect and respond to signals in their extracellular environment is
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C

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In some cases,just a few hormone molecules binding to the surface of a cell can trigger a very large response because
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E

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A substrate binding to an enzyme is most similar to a signal molecule binding to a
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B

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After being fed glucose a cell increases its intracellular glucose concentrations by
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During exposure to elevated glucose,a yeast cell will increase its uptake of glucose.Describe the mechanism by which the yeast sense the extracellular glucose.
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A cell secretes a growth factor that binds to receptors on neighboring cells causing them to proliferate.This is an example of
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A cell secretes a growth factor that binds to receptors on its own membrane preventing it from proliferating.This is an example of
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Insulin is secreted from the pancreas and acts on muscle cells to increase glucose uptake.This is an example of
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Sodium ions move from one cardiac muscle cell to an adjacent cell causing them to contract in unison.This is an example of
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Diabetics can be given insulin which binds to receptors on cells throughout the body increasing glucose uptake.Insulin is an example of a
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Hormones are released from one cell and act on other cells in distant organs.This is an example of
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What do contact-dependent signaling and paracrine signaling have in common?
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A cell responds to a signal it sent.This is an example of
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When the concentration of a ligand is equal to the KD,
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G-protein coupled,enzyme-linked,and ligand-gated ion channel receptors are similar in that they
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A key is placed into a keyhole then turned and the door opens.When considering the components of cell signaling,the action of turning the key would best correspond to
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If the concentration of a ligand is 100 times greater than the Kd of its receptor,
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When epidermal growth factor binds to a(n)_______ receptor,the receptor phosphorylates itself,triggering a signal transduction pathway.
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What happens immediately after a signaling molecule binds to its G-protein coupled receptor (GPCR)?
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Following its initial activation,what becomes of a G protein?
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