Term
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Definition
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Term
| Peripheral Nervous System |
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Definition
–Afferent information (input)
–Efferent information (output) |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| Contains nucleus and most organelles |
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Term
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Definition
| Reception of incoming information |
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Term
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Definition
| Transmits electrical impulses called action potentials |
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Term
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Definition
| Where axon originates and action potentials are initiated |
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Term
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Definition
| Releases neurotransmitter |
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Term
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Definition
| Site of communication between two neurons or between a neuron and an effector organ |
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Term
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Definition
–Always open
–Throughout the neuron
–Resting membrane potential |
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Term
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Definition
–Open or close in response to ligand binding
–Dendrites and cell body
–Synaptic potentials |
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Term
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Definition
| –Open or close in response to changes in membrane potential |
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Term
| Mechanically-gated Channels |
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Definition
associated with sensory of viseral receptors
found at the end of afferent neurons |
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Term
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Definition
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Definition
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Definition
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Definition
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Definition
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Definition
| Part of the CNS (between neurons) |
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Term
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Definition
–Central nervous system
–One oligodendrocyte:
•Forms several myelin sheaths
•Myelinates sections of several axons |
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Term
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Definition
–Peripheral nervous system
–One Schwann cell:
•Forms one myelin sheath
•Myelinates |
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Term
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Definition
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Term
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Definition
2 affectors:
–Ion concentration gradients
–Membrane permeability to these ions
•Ion channels |
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Term
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Definition
Graded potentials
–Small
–Communicate over short distances |
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Term
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Definition
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Term
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Definition
| receptors convert the energy of a sensory stimulus into changes in membrane potential |
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Term
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Definition
Action potentials
–Large
–Communicate over long distances |
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Term
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Definition
| value of the membrane potential at which the electrical driving force is equal and opposite to the chemical driving force |
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Term
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Definition
| Going away from being polarized |
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Term
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Definition
| going tward being polarized |
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Term
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Definition
| Over shot the resting potential |
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Term
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Definition
–Small
–Communicate over short distances |
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Term
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Definition
| Level of depolarization necessary to elicit action potential |
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Term
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Definition
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Term
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Definition
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Term
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Definition
–Same stimulus
–Repeated close together in time |
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Term
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Definition
Spatial summation
–Different stimuli
–Overlap in time |
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