KA4: communication and signalling: co-ordination Flashcards

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1
Q

multicellular organisms signal between…

A

…cells using extracellular signalling molecules

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2
Q

give examples of extracellular signalling molecules

A

-steroid hormones
-peptide hormones
-neurotransmitters

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3
Q

what are receptor molecules of target cells?

A

proteins with a binding site for a specific signal molecule

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4
Q

describe the effect of binding on receptors

A

-changes the conformation of the receptor
-initiates a response within the cell

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5
Q

what do different cell types produce?

A

specific signals that can only be detected and responded to by cells with the specific receptor

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6
Q

why might signalling molecules have different effects on different target cell types?

A

due to differences in the intracellular signalling molecules and pathways that are involved

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7
Q

in multicellular organisms, different cell types may show…

A

…a tissue-specific response to the same signal

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