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

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

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Cell Signalling and Transduction
The signaling molecules called steroid hormones

never enter the blood of humans
are made in one location of the body but have their effects some distance away
bind to cell surface receptors to trigger chemical cascades
are hydrophilic and so cannot penetrate the plasma membrane

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Cell Signalling and Transduction
Cell signaling can be classified into

two distinct types based on the distance over which the signaling molecules act
None of these
three distinct types based on the signaling molecules
three distinct types based on the distance over which the signaling molecules act

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