Cell Signalling and Transduction
In paracrine signaling, the signaling molecules affects only

None of these
target cells close to the cell from which it was secreted
target cells distant from its site of synthesis in cells of an endocrine organ
both (a) and (b)

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

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
It is a steroid

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

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

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