Basics of Communication - Signalling Systems

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  • Created by: Katherine
  • Created on: 02-03-16 13:56
Why are signalling systems needed?
To coordinate the activities of cells/ tissues in a multicellular organism. For neurotransmission, coordination of developmental processes, homeostasis (maintenance of a constant internal balance)
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What are the types of signalling between cells?
Free diffusion between cells, via cytoplasmic connections, direct cell-to-cell contact.
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Signalling by free diffusion is classified into 3 types, what are these:
Autocrine, Paracrine and Endocrine.
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What is Autocrine signalling?
Signalling and reception by the same cell
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What is Paracrine signalling?
Signalling between nearby cells
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What is Endocrine signalling?
Signalling between distant cells (by hormones)
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What happens in Autocrine signalling?
The cell secretes chemicals that modify its own behaviour.
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What is Autocrine signalling usually associated with?
Growth Regulation (negative or positive)
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What is Paracrine signalling?
Cell signalling to neighbouring cells.
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How far do the effects of this signalling go, and how long do they last?
They are local and short lived.
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What type of signalling is important in coordinating the actions of neighbouring cells in embryonic development?
Paracrine signalling
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What is synaptic signalling?
A highly specific and localized type of paracrine signalling between two nerve cells or between a nerve cell and a muscle cell.
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Card 2

Front

What are the types of signalling between cells?

Back

Free diffusion between cells, via cytoplasmic connections, direct cell-to-cell contact.

Card 3

Front

Signalling by free diffusion is classified into 3 types, what are these:

Back

Preview of the front of card 3

Card 4

Front

What is Autocrine signalling?

Back

Preview of the front of card 4

Card 5

Front

What is Paracrine signalling?

Back

Preview of the front of card 5
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