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
NGF; the nerves involved in simple reflexes
Insulin; many different cell types that use glucose for fuel

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Cell Signalling and Transduction
When a __________ reaches its __________ , there is a specific means of receiving it and acting on the message. This task is the responsibility of specialized proteins called __________ .

signaling molecule; target cell; receptors
signaling molecule; receptor; G proteins
signaling molecule; target cell; G proteins
kinase; receptor; proteases

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Cell Signalling and Transduction
Two key organizing principles for large multicellular organisms are

cell specialization and communication between cells
communication between cells and simple nerve reflexes
simple nerve reflexes and cell specialization
prokaryotic cell structure and cell specialization

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

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