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

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

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Cell Signalling and Transduction
Cell signaling can be classified into

None of these
three distinct types based on the distance over which the signaling molecules act
two distinct types based on the distance over which the signaling molecules act
three distinct types based on the signaling molecules

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

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

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

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

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