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

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

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

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

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