Cell Signalling and Transduction
If a disease of the blood vessels caused the endothelial cells of the vessel to die, what effect would that have on the cellular activities associated with vasodilation?

It would be more difficult to increase blood flow and reduce blood pressure
Nitric oxide would no longer be produced
All of these
Smooth muscle cells could not be made to relax

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Cell Signalling and Transduction
Cell signaling can be classified into

None of these
three distinct types based on the signaling molecules
two distinct types based on the distance over which the signaling molecules act
three distinct types based on the distance over which the signaling molecules act

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Cell Signalling and Transduction
In the signal transduction mechanism known as protein phosphorylation

All of these
receptor kinases play a key role in triggering the signal cascade
the signaling molecule binds to a surface receptor
phosphorylated proteins act with enzymes to trigger the signal cascade

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Cell Signalling and Transduction
cAMP and cGMP are derived from

GTP and ATP by the actions of adenylate cyclase and guanylate cyclase respectively
ATP and GTP by the actions of adenylate cyclase and guanylate cyclase respectively
None of these
ATP and GTP by the actions of guanylate cyclase and adenylate cyclase respectively

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