Cell Signalling and Transduction
A cell is known to respond to a particular signaling molecule. Which of the following must be true of this cell?

It is incapable of signal transduction
It contains the receptor for the signaling molecule
It is in the heart muscle
It is also the site of production for the signaling molecule

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Cell Signalling and Transduction
Nitroglycerin has long been administered to human patients suffering from chronic chest pain (angina). This medication works because it

breaks down into nitric oxide, which increases blood flow to the heart
is broken down into hormones that affect the heart
mimics the action of signal receptors
interferes with chemical cascades that trigger contraction of heart muscle

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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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