Questions and Answers
What is a Node of Ranvier?
A periodic gap in the insulating sheath (myelin) on the axon of certain neurons that serves to facilitate the rapid conduction of nerve impulses.
What is a neuron?
A specialized cell transmitting nerve impulses.
What are dendrites?
Short branched extensions of a nerve cell that transmit impulses received from other cells at synapses to the cell body.
What is the myelin sheath?
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What is a Schwann cell?
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What is an axon?
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What is the cell body, also known as soma?
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Study Notes
Neuron Structure and Function
- Node of Ranvier: Gaps in the myelin sheath on the axon, enabling rapid nerve impulse conduction.
- Neuron: A specialized cell responsible for transmitting nerve impulses throughout the nervous system.
- Dendrites: Short, branched extensions of neurons that receive signals from other cells and relay them to the cell body.
- Myelin Sheath: Fatty substance encasing the axon of some neurons, providing electrical insulation, enhancing signal transmission.
- Schwann Cell: A type of glial cell in the peripheral nervous system that generates the myelin sheath by wrapping around axons.
- Axon: A long extension of a neuron that carries electrical impulses away from the cell body, facilitating communication with other neurons.
- Cell Body (Soma): The central part of the neuron, housing the nucleus; connects dendrites and axon for processing and relaying information.
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Description
Test your knowledge on the anatomy of neurons with this labeling quiz. Identify key components such as nodes of Ranvier, dendrites, and the neuron itself. Perfect for students studying neuroscience or biology.
