Unit 1 - Topic 4 - Communication and signalling - Section A - 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

Examples of extracellular signalling molecules include

A

Steroid hormones, peptide hormones, and 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

A

Binding changes the conformation of the receptor, which initiates a response within the cell

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5
Q

Why do signalling molecules have different effects on different target cell types

A

Differences in the intracellular signalling molecules and pathways that are involved.

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6
Q

In a multicellular organism what may different cell types show

A

A tissue-specific response to the same signal

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