1q- Co-ordination Flashcards

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1
Q

How do multicellular organisms signal between cells?

A

Using extracellular signalling molecules

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2
Q

What are three 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

What does binding do to the receptor ?

A

Changes its conformation which initiates a response within the cell

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5
Q

Different cell type produce specific signals that can…?

A

Only be detected and responded to by cells with the specific receptor

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6
Q

Why may signalling molecules have different effects on different cell types?

A

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

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7
Q

In multi-cellular organisms, different cell types may show what in response to the same signal?

A

A tissue-specific response

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