Lecture 10 - LECTURE 10 CHAPTER 11 CELL COMMUNICATION 1...

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1 1 LECTURE 10 CHAPTER 11 CELL COMMUNICATION Goals for this Lecture 1. Understand the types of cell signaling and examples of each 2. Understand the 3 stages of cell signaling and examples of each 3. Learn the types of second messengers 4. Understand the properties of Apoptosis and why it is necessary 2
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2 What are 5 Ways Signals are Relayed Between Cells? 3 4 Signals Relayed Between Cells 1. Direct intercellular signaling Through gap junctions and plasmodesmata 2. Contact-dependent signaling Example: yeast mating types 3. Autocrine signaling Between cells of same type 4. Synaptic signaling vesicles transfer signals between nerve cells 5. Paracrine signaling between nearby cells through extracellular fluid 6. Endocrine signaling Distance signaling between different tissues (hormones)
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3 Fig. 11-4 Plasma membranes Gap junctions between animal cells (a) Cell junctions Plasmodesmata between plant cells (b) Cell-cell recognition Direct intercellular signaling Contact- dependent signaling Fig. 11-2 Receptor factor a factor a a Exchange of mating factors Yeast cell, mating type a Yeast cell, mating type Mating New a/ cell a/ 1 2 3 Contact- dependent signaling
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4 Fig. 11-5 Local signaling Target cell Secreting cell Secretory vesicle Local regulator diffuses through extracellular fluid (a) Paracrine signaling
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Lecture 10 - LECTURE 10 CHAPTER 11 CELL COMMUNICATION 1...

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