Cell Signalling and Transduction
What is the name of the protein signaling molecule that alters glucose uptake, and where would its receptors be located?

Insulin; many different cell types that use glucose for fuel
NGF; the nerves involved in simple reflexes
PDGF; the blood
Insulin; beta cells of the pancreas

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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 nitric oxide cannot cross cell membranes and enter the blood
Because other body tissues use a different signaling molecule
None of these

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Cell Signalling and Transduction
cAMP and cGMP are derived from

None of these
ATP and GTP by the actions of guanylate cyclase and adenylate cyclase respectively
ATP and GTP by the actions of adenylate cyclase and guanylate cyclase respectively
GTP and ATP by the actions of adenylate cyclase and guanylate cyclase respectively

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