15 Questions
Which type of cells are responsible for supporting and maintaining neural structure?
Oligodendrocytes
What is the main way that neurons communicate with each other?
Chemical synapses
Which type of potential is a small positive change in potential?
Excitatory postsynaptic potential (EPSP)
What is the function of myelin in neurons?
To protect and speed up electrical signals
What occurs when the action potential reaches the presynaptic boton?
Calcium channels open up
Which type of summation involves multiple inputs from several neurons?
Spatial summation
What occurs when a sufficient IPSP is present?
The likelihood of generating an action potential is reduced
What happens to unbound neurotransmitters in the synapse?
They are cleared through endocytosis
Which of the following statements accurately describes the resting membrane potential?
The resting membrane potential is the result of a difference in electrical charge across the membrane.
Which of the following accurately describes the action potential?
The action potential is the result of the opening of sodium channels and the influx of positive ions.
What is the function of the myelin sheath?
The myelin sheath insulates the axon, allowing for faster propagation of the action potential.
What are the nodes of Ranvier?
The nodes of Ranvier are gaps in the myelin sheath where the action potential is regenerated.
What is the role of refractory periods in neuronal firing?
Refractory periods prevent neurons from firing constantly.
What causes multiple sclerosis?
Multiple sclerosis is caused by the degradation of oligodendrocytes by the immune system.
What is saltatory conduction?
Saltatory conduction is the process of action potential propagation along the axon by jumping between nodes of Ranvier.
Test your knowledge of neurophysiology and neurochemistry with this quiz! Covering topics such as neuron basics, action potentials, electrochemical signals, and the communication between neurons, this quiz will help you understand the fundamentals of how the brain works.
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