Podcast
Questions and Answers
What is the main function of myelin in the nervous system?
What is the main function of myelin in the nervous system?
- To initiate action potentials
- To regulate neurotransmitter release
- To insulate the electrical signal conducted down the axon (correct)
- To store excess ions
What occurs during the repolarization phase of an action potential?
What occurs during the repolarization phase of an action potential?
- Hyperpolarization of the neuron
- Depolarization of the neuron
- Influx of Na+ ions through ion channels
- Outward movement of potassium ions (correct)
Which ion is responsible for making the inside of the neuron more positive during depolarization?
Which ion is responsible for making the inside of the neuron more positive during depolarization?
- Cl-
- Ca++
- K+
- Na+ (correct)
What is the significance of having a refractory period between impulses in neurons?
What is the significance of having a refractory period between impulses in neurons?
In which part of the brain do neuron cell bodies reside?
In which part of the brain do neuron cell bodies reside?
What happens if there is an irregularity in maintaining the phases of excitatory and inhibitory during action potentials?
What happens if there is an irregularity in maintaining the phases of excitatory and inhibitory during action potentials?
What is the function of glutamate transporters in neurons?
What is the function of glutamate transporters in neurons?
What is the role of specific transporters in extracellular glutamate regulation?
What is the role of specific transporters in extracellular glutamate regulation?
Which lobe of the cerebral cortex is primarily associated with visual processing?
Which lobe of the cerebral cortex is primarily associated with visual processing?
What is the function of myelin with regard to nerve impulse conduction?
What is the function of myelin with regard to nerve impulse conduction?
What is the primary inhibitory neurotransmitter in the CNS?
What is the primary inhibitory neurotransmitter in the CNS?
Which neurotransmitter is primarily involved in excitatory signals in the CNS?
Which neurotransmitter is primarily involved in excitatory signals in the CNS?
Where are dopaminergic neurons mainly located in the brain?
Where are dopaminergic neurons mainly located in the brain?
Which neurotransmitter is implicated in roles related to motivation and punishment?
Which neurotransmitter is implicated in roles related to motivation and punishment?
What is the origin of most norepinephrine pathways in the brain?
What is the origin of most norepinephrine pathways in the brain?
Which neurotransmitter is mainly involved in voluntary movement?
Which neurotransmitter is mainly involved in voluntary movement?
Which neurotransmitter has an inhibitory effect on muscles, decreasing spasms and allowing for muscle tone?
Which neurotransmitter has an inhibitory effect on muscles, decreasing spasms and allowing for muscle tone?
What neurologic disease has dysfunction related to dopaminergic neurotransmission?
What neurologic disease has dysfunction related to dopaminergic neurotransmission?
Which neurotransmitter is considered a key player in memory and learning processes?
Which neurotransmitter is considered a key player in memory and learning processes?
In what region of the brainstem is stress known to activate norepinephrine pathways?
In what region of the brainstem is stress known to activate norepinephrine pathways?
