What part of the membrane composition of a neuron is most important for the permeability of the membrane to various ions? Group of answer choices a. The outside and inside are charged b. There are proteins embedded in the membrane c. There is myelin around some cells d. Its ability to exist in fluid enviornment

What part of the membrane composition of a neuron is most important for the permeability of the membrane to various ions? Group of answer choices a. The outside and inside are charged b. There are proteins embedded in the membrane c. There is myelin around some cells d. Its ability to exist in fluid enviornment

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter35: The Nervous System

Section: Chapter Questions

Problem 5RQ: A(n)______neuron has one axon and one____ dendrite extending directly from the cell body. unipolar...

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A(n)______neuron has one axon and one____ dendrite extending directly from the cell body. unipolar bipolar multipolar pseudounipolar
A neuron receives a series of stimuli that increases the membrane permeability of Na', but not enough to cause membrane potential to surpass-55mV. This neuron is said to be O graded. O amplihed. O facilitated. O refractory
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
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
The neuron cell is made up of which of the following parts? Axon Dendrite Soma All of the above
Which of the following does NOT contribute to the establishment or maintenance of the neuron resting membrane potential? Oa sodium and potassium ions are actively transported across the cell membrane which maintains the resting membrane potential Ob. negatively charged proteins are inside the neuron and are not transported out Oc potassium ions are highly concentrated outside the cell and their are many potassium leakage channels in the membrane Od. sodium ions are more highly concentrated outside the cell and there are fewer sodium ion leakage channels in the membrane
Which neuron would probably have the fastest traveling action potentials? Axon 10 µm and myelinated Axon 10 µm and unmyelinated O Axon 1 um and unmyelinated As long as temperature is constant, they will conduct action potentials at the same speed. O None of the above, axons do not conduct action potentials, dendrites do.
Which statement(s) regarding ions is true when a neuron is at rest? Positively charged cations are attracted to the intracellular fluid Positively charged anions are attracted to the intracellular fluid Negatively charged anions are drawn to the intracellular fluid Negatively charged anions are balanced across the cell membrane
When a neuron is at rest, the inside of the cell A has a slight negative charge relative to the outside B has no charge C has a slight positive charge relative to the outside D has a charge identical to the outside
After a neuron fires an action potential, the ion concentration gradients are disrupted. What reestablishes the normal concentration gradient? O Influx of negatively charged ions into the cell O Outtlow of K+ ions via passive fon channels Na+/K+ pump action O Outflow of Na ions via passive ion channels
If a biologist wished to cause a depolarization event in a neuron, what action would achieve this goal most directly? O increasing its membrane's permeability to Na* O decreasing its membrane's permeability to H* O decreasing its membrane's permeability to CI" O increasing its membrane's permeability to K* O increasing its membrane's permeability to Ca2* MacBook Pro @ $ & 2 4. 6 7 # 3
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