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

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

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

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Cell Signalling and Transduction
When a __________ reaches its __________ , there is a specific means of receiving it and acting on the message. This task is the responsibility of specialized proteins called __________ .

signaling molecule; target cell; G proteins
signaling molecule; target cell; receptors
kinase; receptor; proteases
signaling molecule; receptor; G proteins

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