Cell Signalling and Transduction
Which of the following processes involve the combining of a message from one signaling molecule with that of another to either enhance or inhibit a cellular effect?

Signal amplification
Signal reception
Signal transduction
Signal integration

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Cell Signalling and Transduction
Why is it that inhaling nitric oxide reduces blood pressure only in the lung tissue and not elsewhere in the body*?

Because nitric oxide breaks down quickly and thus cannot travel far
Because other body tissues use a different signaling molecule
None of these
Because nitric oxide cannot cross cell membranes and enter the blood

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Cell Signalling and Transduction
Two key organizing principles for large multicellular organisms are

prokaryotic cell structure and cell specialization
cell specialization and communication between cells
simple nerve reflexes and cell specialization
communication between cells and simple nerve reflexes

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

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