Neuroanatomy Ch. 4 Vocabulary Crossword

The time after a neuron fires when it is unresponsive because sodium channels are inactivated.
A rapid change in membrane polarity, which moves or propagates like a wave down the axon.
Bottom-up or ascending (body to the brain) sensory communication.
Neurites that send signals away from the neuron’s cell body.
The fundamental units of an organism.
A neurite that receives signals and sends them to the neuron’s cell body.
The balancing of charge and concentration gradients in an axon resulting in an action potential.
Top-down or descending (i.e. brain to the body) motor communication.
A nervous system cell that anchors, nourishes, insulates, and protects neurons. Some may also play a role in neural transmission.
A sloping or imbalance of some sort.
Substances that consist of two or more atoms held together by a chemical bond.
Multipolar neurons that connect to the body structures (e.g., muscles) involved with movement.
A fatty, white coating that covers axons and aids neural transmission.
An abnormal massing of cells.
An abnormal mass of nerve tissue.
A nervous system cell with specialized projections that transfers information throughout the body via an electrochemical process.
A chemical messenger that transmits messages through the synaptic cleft from the presynaptic membrane to the postsynaptic membrane.
A group of tissues that together carry out certain functions (e.g., heart, brain).
The time when a neuron will respond to another stimulus, but that stimulus must be stronger than normal due to sodium channels still being in recovery mode.
Peripheral nervous system cells that produce and coat axons in myelin.
Unipolar or bipolar neurons that connect to sensory structures in the body.
A neuron’s cell body.
A connection between a neuron and another neuron, muscle, or gland.
A group of organs that together carry out certain functions (e.g., circulatory, digestive, reproductive).
A group of similar cells that come together to carry out certain functions (e.g., muscle tissue, nervous tissue).
The moving of a substance from point A to point B. May be passive (i.e., no energy expended) or active (i.e., energy expended) in nature.
A degenerative process that occurs after an axon is crushed or cut.