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12 Cards in this Set
- Front
- Back
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Electrical signals |
Changes in a cells membrane potential |
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Chemical signals |
Molecules secreted by cells into the extracellular fluid |
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Target cells |
The cells that respond to electrical or chemical signals |
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Gap junctions |
Allow direct cytoplasmic transfer of electrical and chemical signals between adjacent cells. Protein channels that create cytoplasmic bridges. |
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Contact dependent signals |
Occur when surface molecules on one cell membrane bind to surface molecules on another cells membrane |
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Long distance communication |
Uses a combination of chemical and electrical signals carried by nerve cells and chemical signals transported in the blood |
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Connexins |
Membrane spanning proteins that create gap junctions |
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Paracrine signal |
Chemical that act on cells in the immediate ci |
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Astrocytes |
Exchange materials between neurons and capillaries--most abundant glial cells |
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Ependymal cells |
Create, secrete, and circulate cerebrospinal fluid, creat barrier between compartments |
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Microglial cells |
Main source of immune defense |
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Oligodendrocytes |
Produce an insulating barrier called mylin sheath |
