Exercise: Cell Signalling And Transduction

Questions for: Cell Signalling And Transduction

The signaling molecules called steroid hormones
A:
are made in one location of the body but have their effects some distance away
B:
are hydrophilic and so cannot penetrate the plasma membrane
C:
bind to cell surface receptors to trigger chemical cascades
D:
never enter the blood of humans
Answer: A
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The major second messengers are
A:
cAMP
B:
cGMP
C:
DAG
D:
All of these
Answer: D
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The hormone or ligand can be considered as
A:
first messenger
B:
second messenger
C:
both (a) and (b)
D:
none of these
Answer: A
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Which of the following is a hormone whose action requires a cell surface receptor?
A:
Nitric oxide
B:
Progesterone
C:
Adrenaline
D:
Growth factors
Answer: C
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Two key organizing principles for large multicellular organisms are
A:
prokaryotic cell structure and cell specialization
B:
cell specialization and communication between cells
C:
communication between cells and simple nerve reflexes
D:
simple nerve reflexes and cell specialization
Answer: B
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