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
A signal cascade induced by adrenaline or thyroxine

involves the activation of a G protein
All of these
must begin with receipt of the signal molecule by a surface receptor
results in the activation of a sequence of enzymes needed for the cell effect

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

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Cell Signalling and Transduction
In the signal transduction mechanism known as protein phosphorylation

All of these
receptor kinases play a key role in triggering the signal cascade
the signaling molecule binds to a surface receptor
phosphorylated proteins act with enzymes to trigger the signal cascade

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