Somatic Motor Neuron Vocab And Definitions Flashcards
Structural classification of a motor neuron
Multipolar
Why is a motor neuron classified as multipolar?
Multiple projections off the soma
Where is interneurons found?
Only found in CNS gray matter
What is the function of Nisl bodies
To produce protein
What are the projections off the soma called? And what are they for?
Dendrites, receives information from other neurons.
What type of dendrite gates do sensory neurons have?
Mechanical gates
What type of dendrite gates to motor neurons have?
Lygon gates
Where does the trigger zone start?
The axon hillock
What is the trigger zone comprised of? What begins here and under what conditions?
Na++ voltage gates. Where action potential begins with a threshold of -55V
What supports the neuron’s shape?
Neurofibrils
What is the axon covered with?
Myelin
What is myelin?
Protein lipids
What kind of cell is a PNS myelinated motor neuron formed by?
Shchwann cells
The outside of a Schwann cell
The neurolemma
What is the unmyelinated area called and what is it’s purpose?
It’s called the node of ranvier
Speeds up conduction
