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Nervous System Vocabulary

Across
Neuroglia in the CNA that has cilia that circulate cerebrospinal fluid
Electric current in a neuron that results from the flow of ion; Electrical _____
Compact section of the nerve cell that contains the nucleus and the cytoplasm
Structure where an axon meets the cell body
Neuroglia in the CNS that insulate nerve fiber
Part of the peripheral nervous system that carries messages to the brain and spinal cord
Processes that carry messages to the cell body
Reduction in membrane potential during action potential
An insulation layer that forms around nerves
Type of circuit in which signals from several neurons enter a single neuron
Division of the autonomic nervous system that responds in non-emergency situations
Part of the autonomic nervous system that responds in emergency situation
Nervous system--Part of the nervous system made of the brain and spinal cord
Stage of action potential in which the cell experiences a decrease of voltage due to an efflux of potassium ions along its electrochemical gradient
gaps between Schwann cells on a neuron; Nodes of ___
Type of neural processing in which one nerve signals the next, which signals the next, and so on
Type of circuit in which an incoming signal passes from a single neuron into several neurons that are parallel to one another and then back to a single neuron
Down
___ gradient-Determines the direction that ions will flow through an open ion channel
Increase in membrane potential during an action potential
Nervous system--Part of the motor division that is voluntary
Producing an electrical current that is different from inside (- charge) to outside (+ charge) the nerve cell
Finger-like projections from the cell body that are able to conduct and transmit signals
Type of circuit in which incoming signals travel through a chain of neuron
Junction between a neuron and a neighboring cell
Functional class of neurons that carry messages away from the CNS
Membrane Potential- The voltage difference in a neuron when it is resting
Chemicals that carry signals from a nerve
Another name for the cell body of a neuron
Pore forming membrane proteins that allow ions to pass through a membrane
supporting cell for the nervous system
Functional class of neurons that carry messages to the CNS
Part of the motor division that is involuntary
A nerve cell
Process that carries a message away from the cell body