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Questions and Answers
What is the primary function of the signal direction in a nerve cell?
What is the primary function of the signal direction in a nerve cell?
What are dendrites?
What are dendrites?
Structures that receive signals from other nerve cells
What is the cell body?
What is the cell body?
The part of the neuron that contains the nucleus and organelles
What is the function of the nucleus in a nerve cell?
What is the function of the nucleus in a nerve cell?
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What is an axon?
What is an axon?
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What does the myelin sheath do?
What does the myelin sheath do?
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What are supporting cells?
What are supporting cells?
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What are nodes of Ranvier?
What are nodes of Ranvier?
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What are synaptic knobs?
What are synaptic knobs?
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What is a signal pathway?
What is a signal pathway?
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Study Notes
Signal Direction
- Refers to the way electrical impulses travel within the nerve cell.
- Essential for the communication between neurons and other cells.
Dendrites
- Branch-like structures that receive signals from other neurons.
- Increase the surface area for neurotransmitter connections.
Cell Body
- Contains the nucleus and organelles, coordinating the cell's activities.
- Responsible for integrating incoming signals and determining action potential.
Nucleus
- Central part of the cell body housing genetic material (DNA).
- Controls cell functions and regulates gene expression.
Axon
- Long, thin projection that transmits nerve impulses away from the cell body.
- Ends in axon terminals that connect to other neurons or muscles.
Myelin Sheath
- Fatty layer that insulates the axon, speeding up signal transmission.
- Formed by Schwann cells in peripheral nerves; important for rapid communication.
Supporting Cells
- Glial cells that provide support, nutrition, and protection for neurons.
- Types include astrocytes, oligodendrocytes, and microglia.
Nodes of Ranvier
- Gaps in the myelin sheath along the axon.
- Facilitate faster signal transmission through saltatory conduction.
Synaptic Knobs
- Specialized structures at the end of axons where synapses occur.
- Contain neurotransmitters that transmit signals to other neurons or target cells.
Signal Pathway
- The route taken by electrical impulses as they travel through the nerve cell.
- Includes dendrites, cell body, axon, and synaptic knobs.
Studying That Suits You
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Description
Test your knowledge on the anatomy of nerve cells with this labeling quiz. Each card presents a different component of the neuron, allowing you to identify key parts and their functions. Perfect for students studying biology or neuroscience.
