### Quiz: Understanding Ionic Movement in Neurons at Rest**Question:** Which statement(s) regarding ions is true when a neuron is at rest?**Options:** - ☐ 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 **Explanation:**This multiple-choice question is part of a quiz designed to assess your understanding of ionic distribution and behavior in neurons at rest. Select the correct statement(s) regarding how ions behave in a resting neuron. Consider the roles of different ions and their charges in establishing and maintaining the resting membrane potential.

Neurons are also known by the name nerve cells. These cells are referred to as the fundamental units…

Answered: Which statement(s) regarding ions is…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Similar questions

When a membrane channel opens, there is a reduction in the membrane_ which generates allowing ions to enter the neuron increasing the membrane measured by a change in capacitance, resistance, potential energy, voltage voltage, capacitance, potential energy, resistance resistance, capacitance, potential energy, voltage potential energy, resistance, voltage, capacitance
Assume a neuron is at rest and the following changes happen: Step 1: Neurotransmitter binds to an ionotropic excitatory neurotransmitter receptor causing an EPSP. Step 2: With the neurotransmitter still bound either a NAM or non-competitive antagonist bind to the allosteric site of the receptor. Answer the following questions that explains how the NAM and non-competitive antagonist would differ in their actions. 4.) A. Going from step 1 to step 2 what would happen to the ionotropic receptor (ion channel) as a result of the NAM. B. Going from step 1 to step 2 what would happen to the ionotropic receptor (ion channel) as a result of the non-competitive antagonist. C. Going from step 1 to step 2 how would membrane potential change as a result of the NAM D. Going from step 1 to step 2 how would the membrane potential change as a result of the non-competitive antagonist.
1.A poison causes a drastic rise inE value with stimulation of the membrane.Thereafter membrane is slow to return towards resting membrane potential and levels off several millivolts above the threshold potential. This poison has likely affect which feature of the membrane? a) voltage gated na+ channels. b) voltage gated K+ channels. c) Na+/K+ Atp pump 2. All cell membrane demonstrate action potential if stimulated enough? True/False. 3. how many peaks are there in a compound action potential? a)2. b)4 c)6 d)8 4. Increasing the ionic concentration in the salt bridge results in E value increase to a point after which it plateeus. This is evidence brownian movement at work in the ionic solution that is keeping from energy flowing through the bridge with the fidelity that is seen in the metal bridge? True/ False 5. All cell membrane demonstrate action potential if stimulated enough? True or False.
Contrast chemically gated and voltage gated channels. How do their functions differ? In which segments of a neuron are found?
structures in the following diagram of a neuron. ?do it
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.
Explain what is going on at sites A, B, C, D, F and G in relation to CHARGE (negative, positive, rising, falling) and open or closed Na+ and K+ ion channels +40 Voltage (mv) O -55 -70 Threshold B A 1 E D 2 3 Time (ms) F 4 G
If K+ channels are blocked by TEA (tetraethyl ammonium), what happens to the equilibrium potential for K+? Becomes more positive Becomes more negative Does not change
Describe what allows an action potential to move quickly along the membrane in one direction (why doesn't it move backwards?)
Consider the brain and spinal neurons. If you bathed a resting neuron with an excess of potassium ions (for example, more than 40 times higher than normal), what would be the effect on resting membrane potential?
Fill in the blank: As a result of an additive phenomenon called _______________________, the threshold potential of a membranemay be reached.
Match each region of a neuron to the category of ion channels found there: Axon: Axon terminal: Dendrite: Axon Hillock: ANSWER OPTIONS: Voltage gated sodium and potassium channels Voltage gated calcium channels Voltage gated potassium channels Voltage gated sodium channels

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