Structure of Neuron
Describes the fundamental components of a neuron including dendrites, cell body, axon, and their specialized functions.
What is Structure of Neuron?
A specialized cell transmitting nerve impulses; a nerve cell.
Key points
- Identify and describe the main parts of a neuron.
- Explain the function of dendrites, cell body, and axon.
- Understand the role of the myelin sheath and synapse in neural communication.
Common exam trap
Confusing the direction of signal transmission: signals travel from dendrites to cell body, then along the axon.
Definitions
- Term
Neuron
- Meaning
A specialized cell transmitting nerve impulses; a nerve cell.
- Term
Dendrites
- Meaning
Short, branched extensions of a nerve cell, along which nerve impulses are received from other neurons and transmitted to the cell body.
- Term
Cell Body (Soma)
- Meaning
The part of a neuron that contains the nucleus and cytoplasm, from which dendrites and an axon extend.
- Term
Axon
- Meaning
A long, slender projection of a nerve cell, or neuron, that typically conducts electrical impulses known as action potentials away from the nerve cell body.
- Term
Myelin Sheath
- Meaning
An insulating layer, formed by Schwann cells (in the peripheral nervous system) or oligodendrocytes (in the central nervous system), that surrounds the axon of some neurons, increasing the speed at which nerve impulses are conducted.
- Term
Synapse
- Meaning
A junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.
Learning objectives
Identify and describe the main parts of a neuron.
Explain the function of dendrites, cell body, and axon.
Understand the role of the myelin sheath and synapse in neural communication.
Prerequisites
Basic cell biology (cell membrane, nucleus, organelles)
Concept of electrical and chemical signals
Common mistakes
Confusing the direction of signal transmission: signals travel from dendrites to cell body, then along the axon.
Not understanding the role of myelin sheath in impulse conduction.
Confusing neurons with glial cells, which support neurons.
Keywords
Neuron
Nerve Cell
Dendrites
Cell Body
Soma
Axon
Axon Terminal
Myelin Sheath
Synapse
Nerve Impulse
Neurotransmitter
Practice preview
Which part of the neuron is primarily responsible for receiving incoming signals from other neurons?…
easy
The nucleus of a neuron is typically located within which of its structural components?…
easy
Nissl bodies, characteristic granular structures found in the neuron, are primarily involved in which cellular process?…
medium