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

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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 destroy the receptors for key signaling molecules
They alter the chemical structure of key signaling molecules
They prevent the production of key signaling molecules

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Cell Signalling and Transduction
Which of the following is true about a hydrophilic signaling molecule?

It is a steroid
Since it can enter the cell, it directly affects some specific cell process
It might trigger a signal cascade that causes some effect in a cell
Its receptor is located in the cytosol of the target cell

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