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Cell Signalling and Transduction

Cell Signalling and Transduction
Small charged molecules, often biogenic amines function as

hormones
neurotransmitters
none of these
both (a) and (b)

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

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Cell Signalling and Transduction
The enzyme that catalyzes the splitting of PIP2 into two molecules of inositol triphosphate (IP3) and diacylglycerol in cell signaling, is

phosphokinase C
phospholipase C
lipokinase
phosphodiesterase C

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Cell Signalling and Transduction
Which of the following is a hormone whose action requires a cell surface receptor?

Progesterone
Growth factors
Adrenaline
Nitric oxide

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

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

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Cell Signalling and Transduction
The major second messengers are

DAG
cAMP
cGMP
All of these

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