In a neuron, the conducting regions of the capacitor are represented by the intracellular and extracellular solutions. The non-conducting insulator of the capacitor is represented by what cell element? Receptors Lipid bilayer Axon diameter Channels

In a neuron, the conducting regions of the capacitor are represented by the intracellular and extracellular solutions. The non-conducting insulator of the capacitor is represented by what cell element? Receptors Lipid bilayer Axon diameter Channels

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section: Chapter Questions

Problem 10RE

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Concept explainers

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.

Question

In a neuron, the conducting regions of the capacitor are represented by the
intracellular and extracellular solutions. The non-conducting insulator of the
capacitor is represented by what cell element?
Receptors
Lipid bilayer
Axon diameter
Channels

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The above depolarization of a neuron will result in which of the following ionic currents? a potassium current will transport K+ ions out of the cytoplasm a sodium current will transport Na+ ions out of the cytoplasm a potassium current will transport K+ ions into the cytoplasm a sodium current will transport K+ ions out of the cytoplasm E. a sodium current will transport Na+ ions into the cytoplasm
The above repolarization of a neuron will result in which of the following ionic currents? a potassium current will transport K+ ions out of the cytoplasm a sodium current will transport Na+ ions out of the cytoplasm a potassium current will transport K+ ions into the cytoplasm a sodium current will transport Na+ ions into the cytoplasm a sodium current will transport K+ ions into the cytoplasm
The above depolarization of a neuron will result in which of the following ionic currents? a potassium current will transport K+ ions out of the cytoplasm a sodium current will transport Na+ ions out of the cytoplasm a potassium current will transport K+ ions into the cytoplasm a sodium current will transport K+ ions out of the cytoplasm a sodium current will transport Na+ ions into the cytoplasm
The interior of a neuron's plasma membrane at resting membrane potential will have a positive charge and contains less sodium than outside of the cell positive charge and contains more sodium than outside the cell negative charge and contains less sodium than outside the cell O negative charge and contains more sodium than outside the cell
When a cell membrane potential shifts from -70mV to -90mV we say the membrane has: depolarized repolarized hyperpolarized polarized GOOO0
When a neuron is a rest, the sodium ions flow through the membrane at a very low rate. Why is this? The sodium ions are negatively charged, and are not drawn into the negatively charged neuron Sodium ions are much larger than calcium, potassium, or chlorine ions Sodium ions always flow through the membrane at a very low rate, whether the neuron is at rest or not at rest The sodium ion channels are closed when a neuron is at rest
Two scientists calculated the membrane potential of a neuron using two different equations, the Nernst equation and the Goldman equation. Their calculations gave them slightly different predictions. What is the most likely reason for this difference? The lipid compositions of the cell membranes that the scientists studied were different. The scientists placed their measuring electrodes in slightly different positions. The temperatures of the fluid surrounding the cell membranes were different. The numbers of ions considered in the calculations were different. The scientists measured different numbers of cells.
Repolarization occurs because Multiple Choice more sodium ions diffuse into the cell than potassium ions diffuse out of it. potassium ions continue to diffuse out of the cell after the inactivation gates of the voltage-gated sodium ion channels begin to close. the increased potassium ion permeability lasts slightly longer than the time required to bring the membrane potential back to its resting level. the extra efflux of potassium ions causes the membrane potential to become slightly more positive than the resting value. the inactivation gates of the voltage-gated sodium ion channels begin to open and the diffusion of sodium ions decreases.
In the above diagram, letter C represents: A voltage-gated K+ channel A leaky Na+ channel A leaky K+ channel A voltage-gated Na+ channel
A cell biologist is performing an experiment using the voltage clamp method in which they are allowed to change the voltage in the membrane potential. They are wanting to record potassium currents and notice that for a certain membrane potential range, the voltage clamp highlights that there is an inward current of potassium. Would these readings make sense?
A neuron has a resting membrane potential of -70 milivolts (mV) and a threshold value of -55 mV. Three synapses on the body of this neuron receive the impulses listed below. hyperpolarisation by 5 mV • depolarisation by 15 mV • depolarisation by 10 mV ENTER THE MEMBRANE POTENTIAL AS A NUMBER WITH + OR - IN FRONT OF IT. The final membrane potential will be mV and this cause an action potential becasue it is v than the
When a cell membrane potential of a neuron shifts from +10V to -70mV we say the membrane has: depolarized repolarized hyperpolarized polarized 50000