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?

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

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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
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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Cell Signalling and Transduction
Which of the following is true about a hydrophilic signaling molecule?

Its receptor is located in the cytosol of the target cell
It is a steroid
It might trigger a signal cascade that causes some effect in a cell
Since it can enter the cell, it directly affects some specific cell process

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