The Chapter 5 Test will be on Thursday, October 16.
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Transcript of The Chapter 5 Test will be on Thursday, October 16.
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• The Chapter 5 Test will be on Thursday, October 16.
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Sign up for your shirt number and size.~ $23.00
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We would use the same font for names which will be on the sleeve - do you want the name to read from shoulder to wrist?
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• Graph…..
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You Must Know
• Bulk Transport
• How cells communicate with each other.
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CONCEPT 5.5: Bulk transport across the plasma membrane occurs by exocytosis and endocytosis
Exocytosis
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Endocytosis
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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.
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Local Signaling By Direct Contact
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Plant Cells
Local Signaling By Direct Contact
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Local regulatordiffuses throughextracellular fluid.
Secretingcell Secretory
vesicle
Target cell
Local signaling
Paracrine signaling
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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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The Three Stages of Cell Signaling: A Preview
• Cells receiving signals undergo three processes– Reception– Transduction– Response
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Figure 5.20-1
EXTRACELLULARFLUID Plasma membrane
Reception
Receptor
Signalingmolecule
CYTOPLASM
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Figure 5.20-2
EXTRACELLULARFLUID
CYTOPLASM
Plasma membrane
Reception Transduction
Relay molecules
Receptor
Signalingmolecule
© 2014 Pearson Education, Inc.
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Figure 5.20-3
EXTRACELLULARFLUID
CYTOPLASM
Plasma membrane
ResponseReception Transduction
Relay molecules
Activation
Receptor
Signalingmolecule
© 2014 Pearson Education, Inc.