Compare and contrast the receptor and postreceptor events for lipophilic and hydrophilic hormones
What will be an ideal response?
At their target cells, hydrophilic hormones bind with surface membrane receptors. On binding, these hormones trigger a chain of intracellular events by means of second messenger systems that ultimately alter pre-existing cellular proteins, usually enzymes, which exert the effect leading to the target cell's response to the hormone.
Lipophilic hormones readily enter through the lipid membrane barriers of their target cells and bind with nuclear receptors.?The hormone-receptor complex binds to DNA at a specific attachment site known as the hormone response element. Hormonal binding activates a specific gene within the target cell leading to production of a new protein
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A neuron with many short dendrites and a single long axon is a ______________ neuron.
A) multipolar B) unipolar C) bipolar
Briefly describe how proteins move through the Golgi complex
What will be an ideal response?
Mechanoreceptors translate mechanical signals into electrical signals when pressure on the cell
A) Activates a G-protein signal transduction cascade. B) Disrupts stability of the lipid bilayer, causing ions to flow. C) Induces a conformational change in ion channels, allowing ions to flow. D) Induces a change in cell volume that disrupts ion balance.
A molecule with the sequence of AUCGUCA should be categorized as ________
A) ATP B) an enzyme C) RNA D) DNA E) a triglyceride