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

relaxation of smooth muscle cells
reduced blood pressure
All of these
the release of nitric oxide from endothelial 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 prevent the production of key signaling molecules
They block the normal functioning of signal transduction mechanisms
They alter the chemical structure 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; receptors
signaling molecule; target cell; G proteins
signaling molecule; receptor; G proteins
kinase; receptor; proteases

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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?

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

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