Podcast
Questions and Answers
What is the resting potential of a neuron?
What is the resting potential of a neuron?
- -50mV
- -70mV (correct)
- -100mV
- -90mV
What is the main role of axons in our vision?
What is the main role of axons in our vision?
- Compensating for movement accuracy (correct)
- Stimulating hormone release
- Detecting color
- Regulating sleep patterns
What covers a neuron and is composed of 2 layers of phospholipid molecules?
What covers a neuron and is composed of 2 layers of phospholipid molecules?
- Golgi Apparatus
- Membrane (correct)
- Endoplasmic Reticulum
- Mitochondria
What provides the membrane of a neuron with a combination of flexibility and firmness?
What provides the membrane of a neuron with a combination of flexibility and firmness?
What is the role of electrical gradient (polarization) in a neuron?
What is the role of electrical gradient (polarization) in a neuron?
What type of channels permit certain ions to cross through the neuron membrane at a controlled rate?
What type of channels permit certain ions to cross through the neuron membrane at a controlled rate?
What is the main reason a neuron inside the membrane has a slightly negative electrical potential with respect to the outside?
What is the main reason a neuron inside the membrane has a slightly negative electrical potential with respect to the outside?
How is resting potential in a neuron typically measured?
How is resting potential in a neuron typically measured?
What is the typical level of resting potential in a neuron?
What is the typical level of resting potential in a neuron?
What is the most common electrode used for recording activity of a neuron?
What is the most common electrode used for recording activity of a neuron?
Which chemicals pass through a neuron membrane more freely because channels for them are always open?
Which chemicals pass through a neuron membrane more freely because channels for them are always open?
What are the biologically important ions that cross membrane channels sometimes open or closed?
What are the biologically important ions that cross membrane channels sometimes open or closed?
What happens to the resting potential when the neuron is stimulated?
What happens to the resting potential when the neuron is stimulated?
What is the molecular basis of action potential regarding sodium and potassium ions?
What is the molecular basis of action potential regarding sodium and potassium ions?
What happens at the peak of the action potential?
What happens at the peak of the action potential?
What is the function of a voltage-gate channel?
What is the function of a voltage-gate channel?
During the resting potential, what is the state of potassium channels?
During the resting potential, what is the state of potassium channels?
What does hyperpolarization refer to?
What does hyperpolarization refer to?
What happens to the sodium-potassium pump after an unusually rapid series of action potentials?
What happens to the sodium-potassium pump after an unusually rapid series of action potentials?
Under what conditions does excessive stimulation leading to the buildup of toxic sodium typically occur?
Under what conditions does excessive stimulation leading to the buildup of toxic sodium typically occur?
What is the role of local anesthetic drugs like NOVOCAIN and XYLOCAIN on the sodium channels of the membrane?
What is the role of local anesthetic drugs like NOVOCAIN and XYLOCAIN on the sodium channels of the membrane?
What do action potentials require for their occurrence?
What do action potentials require for their occurrence?
How do local anesthetic drugs like NOVOCAIN and XYLOCAIN affect the transmission of pain signals?
How do local anesthetic drugs like NOVOCAIN and XYLOCAIN affect the transmission of pain signals?
What happens when a dentist administers NOVOCAIN before a dental procedure?
What happens when a dentist administers NOVOCAIN before a dental procedure?
What is the function of the sodium-potassium pump?
What is the function of the sodium-potassium pump?
During rest, why do very few sodium ions cross the membrane?
During rest, why do very few sodium ions cross the membrane?
What is the role of potassium channels during rest?
What is the role of potassium channels during rest?
Which ions are more concentrated outside the neuron when the membrane is at rest?
Which ions are more concentrated outside the neuron when the membrane is at rest?
What happens to the electrical gradient across the membrane as potassium ions leak out slowly?
What happens to the electrical gradient across the membrane as potassium ions leak out slowly?
Why does the selective permeability of the membrane make the Sodium Potassium Pump (SSP) effective?
Why does the selective permeability of the membrane make the Sodium Potassium Pump (SSP) effective?
