Podcast
Questions and Answers
What is the primary function of the sodium-potassium pump in a neuron?
What is the primary function of the sodium-potassium pump in a neuron?
- To maintain the resting membrane potential (correct)
- To open potassium channels
- To generate action potential
- To facilitate synaptic transmission
What is the main problem that neurons solve using electrical signals?
What is the main problem that neurons solve using electrical signals?
- Conducting information over a long distance (correct)
- Generating action potential
- Facilitating synaptic transmission
- Conducting information over a short distance
What determines the distribution of ions inside and outside of a neuron at rest?
What determines the distribution of ions inside and outside of a neuron at rest?
- Electrostatic pressure and diffusion (correct)
- The action potential and neural integration
- Neurotransmitter synthesis and synaptic transmission
- Electrochemical forces and the sodium-potassium pump
What is the role of potassium channels in the resting membrane potential?
What is the role of potassium channels in the resting membrane potential?
What is the resulting effect of electrochemical forces on the neural membrane?
What is the resulting effect of electrochemical forces on the neural membrane?
What is the primary carrier of electrical charge in the cytosol of the axon?
What is the primary carrier of electrical charge in the cytosol of the axon?
What is the main component of the fluid inside cytosol and extracellular fluid?
What is the main component of the fluid inside cytosol and extracellular fluid?
What type of bond is formed between hydrogen and oxygen atoms in a water molecule?
What type of bond is formed between hydrogen and oxygen atoms in a water molecule?
What is the term for ions with a positive charge?
What is the term for ions with a positive charge?
What is the function of membrane proteins in the phospholipid bilayer?
What is the function of membrane proteins in the phospholipid bilayer?
What is the term for molecules that are attracted to water?
What is the term for molecules that are attracted to water?
What is the energy source utilized by ion pumps to transport ions across the bilayer?
What is the energy source utilized by ion pumps to transport ions across the bilayer?
What is the ratio of K⁺ to A⁻ when the microelectrode records no potential difference (Vm=0)?
What is the ratio of K⁺ to A⁻ when the microelectrode records no potential difference (Vm=0)?
What happens to the inside of the membrane when potassium ions (K⁺) move out of the cell?
What happens to the inside of the membrane when potassium ions (K⁺) move out of the cell?
What is the equilibrium potential of potassium ions (K⁺) approximately equal to?
What is the equilibrium potential of potassium ions (K⁺) approximately equal to?
What is the primary reason for the net movement of ions across the membrane?
What is the primary reason for the net movement of ions across the membrane?
What is the result of a small change in ionic concentrations on the membrane potential?
What is the result of a small change in ionic concentrations on the membrane potential?
What is the term for the ability of the membrane to store electrical charge?
What is the term for the ability of the membrane to store electrical charge?
What is a characteristic of K⁺ channels?
What is a characteristic of K⁺ channels?
What is required for a net movement of ions across the membrane through open channels?
What is required for a net movement of ions across the membrane through open channels?
What is the result of diffusion in a solution?
What is the result of diffusion in a solution?
What is the driving force behind the movement of ions from regions of high concentration to low concentration?
What is the driving force behind the movement of ions from regions of high concentration to low concentration?
What is the term for the difference in concentration of ions between two regions?
What is the term for the difference in concentration of ions between two regions?
What can induce a net flow of ions in a solution?
What can induce a net flow of ions in a solution?
What is the ionic driving force for a particular ion?
What is the ionic driving force for a particular ion?
What is the purpose of the ion pumps in the neuronal membrane?
What is the purpose of the ion pumps in the neuronal membrane?
What would happen to the membrane potential if the extracellular K+ concentration increases?
What would happen to the membrane potential if the extracellular K+ concentration increases?
What is the Goldman equation used for?
What is the Goldman equation used for?
What is the role of the sodium-potassium pump in neuronal signaling?
What is the role of the sodium-potassium pump in neuronal signaling?
What is the effect of a mutation in a specific K+ channel on the neuronal function?
What is the effect of a mutation in a specific K+ channel on the neuronal function?
What is the role of the blood-brain barrier in regulating the concentration of K+ ions?
What is the role of the blood-brain barrier in regulating the concentration of K+ ions?
What is the function of the pore-loop in potassium channels?
What is the function of the pore-loop in potassium channels?
What is the resting membrane potential close to?
What is the resting membrane potential close to?
What is the consequence of the differential concentrations of ions inside and outside the neuron and the semipermeable nature of the membrane?
What is the consequence of the differential concentrations of ions inside and outside the neuron and the semipermeable nature of the membrane?
