The Neuromuscular Junction Flashcards
(10 cards)
What is facilitation?
Where the effect of one neuron is not enough to cause an action potential but when it has the help of the other it can enhance the effects and maybe cause firing
What is presynaptic inhibitation?
Where one neuron suppresses the other
What are neuronal pools?
Presynaptic fiber branches and synapses with several neurons that form a pool
There’s the discharge zone where neurons are closer to the incoming fiber
The facilitated zone where neurons are farther from the incoming fiber
What are the types of circuits in a neuronal pool?
The converging
Diversing
Oscillating
After-Discharge
What is the diverging circuit?
One incoming fiber stimulating other increasing fibers
May affect one or several pathways
Found in sensory or motor systems
What is the converging circuit?
Opposite of diverging
Can result in strong stimulation or inhibitation
What is the oscillating circuit?
A chain of neurons containing collateral synapses with previous chain of neurons
What is the after discharge circuit?
It is where a incoming circuit stimulates several neurons in a parallel arrays
What is the diffrence between serial and parallel processing?
With parallel it has multiple pathways that promotes several responses like a specific smell that reminds you of a diffreny odor
Serial
A single pathway very rapid and produces a specific response that’s always the same
What happens at the neuromuscular junction?
This is where the motor neuron stimulates the muscle fiber
Where action potentials arrive at the axon terminal
The voltage gates open casing CA to enter the axon terminal (which contains synaptic vessicles, which contain Acetylcholine abd exotytosis happens where ca causes the neurotransmitter to release Acetylcholine
And then the Ach diffuses into the synaptic cleft and binds to receptors of the postsynaptic membrane
And then the binding causes ion channels to firm graded potentials and theres a reuptake of the Nt
