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

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

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Cell Signalling and Transduction
In terms of cell communication, what do bacterial pathogens such as cholera and anthrax have in common?

They alter the chemical structure of key signaling molecules
They prevent the production of key signaling molecules
They destroy the receptors for key signaling molecules
They block the normal functioning of signal transduction mechanisms

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