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10 Cards in this Set
- Front
- Back
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What receives the signal in most cases of cell communication?
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a receptor protein on the target cell
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What are the 4 mechanisms of cell communication?
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1. Contact Dependent Signaling
2. Paracrine Signaling 3. Synaptic Signaling 4. Endocrine signaling |
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What is contact dependent signaling?
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-relatively rare
-no chemical released - cells have to come into very close contact - Important during embryonic development |
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What is paracrine signaling?
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-common
- can target multiple, neighbouring cells - doesn't go very far (local) -signal is released by exocytosis and acts on multiple neighbouring targets (paracrine) - or on the signaling cell itself (autocrine) - acts as a feedback mechanism that allows the cell to control the signal |
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What is the difference between Paracrine and autocrine?
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Paracrine- in paracrine signaling, when the signal acts on multiple neighbouring targets
Autocrine: when the signal acts on the cell itself. - feedback mechanism that allows the cell to control the signal |
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What is synaptic signaling? Where does it function?
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- Only functions on cells of the nervous system
- equivalent to "face to face conversation" - signal is produced by a neuron and released at a synapse; acts on a single postsynaptic target |
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What is endocrine signaling?
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- When a hormone is released by exocytosis, it is released into the blood stream and can reach cells that are far away
- acts on multiple cells |
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What kind of cell produces hormones?
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an Endocrine cell
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What types of signaling target multiple cells? What kind target single cells?
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Multiple cells
- Paracrine Signaling -Endocrine Signaling Single cell - Synaptic signaling -Contact dependent signaling (I'm only 90% sure about this) |
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- What are the types of signaling molecules? Which is most common? Least common?
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-hydrophilic (most common)
-hydrophobic -gases(least common) |
