chapter 5 bulk transport local and long distance signaling
TRANSCRIPT
You Must Know
• Bulk Transport
• How cells communicate with each other.
CONCEPT 5.5: Bulk transport across the plasma membrane occurs by exocytosis and endocytosis
Exocytosis
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Endocytosis
CONCEPT 5.6: The plasma membrane plays a key role in most cell signaling
• In multicellular organisms, cell-to-cell communication allows the cells of the body to coordinate their activities.
• Communication between cells is also essential for many unicellular organisms.
© 2014 Pearson Education, Inc.
© 2014 Pearson Education, Inc.
Local Signaling By Direct Contact
Plant Cells
Local Signaling By Direct Contact
Local regulatordiffuses throughextracellular fluid.
Secretingcell Secretory
vesicle
Target cell
Local signaling
Paracrine signaling
Ex. Growth Factors
Target cellis stimulated.
Electrical signalalong nerve celltriggers release of neuro- transmitter.
Neurotransmitter diffuses across synapse.
Synaptic signalingLocal signaling
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Long-distance signaling
Endocrine cell
Target cellspecificallybindshormone.
Endocrine (hormonal) signaling
Hormonetravels inbloodstream.
Bloodvessel
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