motor end plate

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motor end plate

The motor end plate releases neurotransmitters to stimulate the muscle fiber.

Definition
  1. Noun:
    • The specialized terminal structure of a motor neuron: A motor end plate is the flattened, disc-shaped ending of a motor neuron's axon. It forms a synaptic connection (neuromuscular junction) with a muscle fiber.
    • The site of neural impulse transmission to a muscle: It is the specific location where the neuron releases neurotransmitters (primarily acetylcholine) to chemically stimulate and trigger contraction in the muscle cell.
Usage Examples
  • Noun:
    • The neurotransmitter acetylcholine is released from the motor end plate.
    • Damage to the motor end plate can result in muscle weakness.
Advanced Usage
  • "End-plate potential": The local depolarization of the muscle fiber membrane generated at the motor end plate in response to neurotransmitter release.
    • The summation of end-plate potentials can lead to a muscle action potential.
Variants and Related Words
  • Neuromuscular junction (n): The entire synaptic connection between a motor neuron and a muscle fiber, which includes the motor end plate.
    • The neuromuscular junction is essential for voluntary movement.
  • Synaptic cleft (n): The narrow gap between the motor end plate and the muscle fiber membrane.
    • Neurotransmitters diffuse across the synaptic cleft.
Synonyms
  • Myoneural junction: A technical synonym emphasizing the connection between nerve and muscle.
  • Motor end-plate: An alternate hyphenated spelling.
Related Terms (Conceptual)
  • Motor neuron (n): The nerve cell whose axon terminal forms the motor end plate.
    • The cell body of the motor neuron is located in the spinal cord.
  • Acetylcholine receptor (n): The protein on the muscle fiber membrane that binds the neurotransmitter released from the motor end plate.
    • Toxins can block acetylcholine receptors at the motor end plate.
motor end plate

The motor end plate releases neurotransmitters to stimulate the muscle fiber.

Noun
  1. the flattened end of a motor neuron that transmits neural impulses to a muscle

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