Cell Signalling and Transduction
In vasodilation, proper nerve signals sent to blood vessels cause

relaxation of smooth muscle cells
All of these
reduced blood pressure
the release of nitric oxide from endothelial cells

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Cell Signalling and Transduction
cAMP and cGMP are derived from

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

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Cell Signalling and Transduction
Cell signaling can be classified into

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

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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
All of these
Nitric oxide would no longer be produced
Smooth muscle cells could not be made to relax

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