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

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

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Cell Signalling and Transduction
In terms of cell communication, what do bacterial pathogens such as cholera and anthrax have in common?

They block the normal functioning of signal transduction mechanisms
They prevent the production of key signaling molecules
They alter the chemical structure of key signaling molecules
They destroy the receptors for key signaling molecules

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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
None of these
Because other body tissues use a different signaling molecule

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