Cell Signalling and Transduction
In paracrine signaling, the signaling molecules affects only

None of these
both (a) and (b)
target cells distant from its site of synthesis in cells of an endocrine organ
target cells close to the cell from which it was secreted

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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?

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

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

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

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