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
PDGF; the blood
NGF; the nerves involved in simple reflexes
Insulin; beta cells of the pancreas

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

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Cell Signalling and Transduction
A signal cascade induced by adrenaline or thyroxine

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

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