The movement of sodim and potassium ions is an important part of how a neuron generates an action potential, the movement is controlled by three transport proteins. Guess the effect of a sustance that inhibits sodium channels from opening. How might this substance affect the way the nervous system functions

The movement of sodim and potassium ions is an important part of how a neuron generates an action potential, the movement is controlled by three transport proteins. Guess the effect of a sustance that inhibits sodium channels from opening. How might this substance affect the way the nervous system functions

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

See similar textbooks

Similar questions

Think about how the neuron membrane-capacitor works – via the motion of charged ions from inside-to-outside and outside-to-inside the cell. Describe phenomenologically how you think the membrane potential can be made to propagate down the length of a neuron. Draw some diagrams to aid your description.
The diagram below indicates different ion concentrations from the inside to the outside of a neuron while the neuron is at rest. A. Use the different colour to indicate the sodium ions, potassium ions, sodium ion channels, and potassium ion channels. B. Also indicate the charge inside and outside the neuron. Your answer NUNUNU extracellular fluid cytoplasm
Draw a sketch of a graph showing a complex AHP consisting of a first component AHP, an ADP, and a second component AHP before repolarization to resting membrane potential
Which of the following statements about voltage gated channels is true? Voltage-gated sodium channels open at a higher (more positive) membrane potential than do potassium-gated channels Voltage-gated sodium channels open at a lower (more negative) membrane potential than do potassium-gated channels Sodium- and postassium-gated channels open at about the same membrane potential, but they have different effects because there are different numbers of the two kinds of channels in neuron cell membranes
Which statement best describes the interaction that occurs as a result of the binding of a ligand to a ligand-gated ion channel receptor? A B с D ligand extracellular environment gate closed inactive ligand-gated ion channel receptor ions The process permanently opens or closes the ion channel. cytoplasm The process alters the membrane potential by changing the intracellular ionic concentration. The process causes G proteins to bind with GTP and become activated. The process removes three sodium ions from the cell and brings in two potassium ions.
Repolarization is when the cell membrane potential becomes more positive the sodium channels open on the membrane the calcium channels open on the membranc the cell membrane potential becomes more negative.
Compare the resting membrane potential of a neuron with the potassium and sodium equilibrium potentials. Explain how this comparison relates to the relative permeabilities of the resting plasma membrane to these two ions.
Neurons conduct electrical signals along their axons in One Direction what structure do some neurons have the increase conduction speed
Explain why the inside of the membrane changes form a jet negative charge to a positive charge at the peak of the action potential and then back to a net negative charge after the action of potential.
The figure below may help in answering some of the questions. 1. What ions are flowing (and in which direction) both during the rising phase and the falling phase of the action potential? 2. What are the values of both the 'y' (vertical) axis and the 'x' (horizontal) axis. 3. If extracellular levels of K+ rose (a condition called hyperkalemia), how would that affect the resting membrane potential? 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
Fill in the diagram, your illustration should demonstrate for each phase of the AP: 1. The relative concentration of K and Na 2. The relative voltage across the membrane 3. Any movement across the membrane of K and NA 4. The three kinds of channels in the membrane, and their state (open or closed) 5. Finally, indicate on the graph of the AP which phases correspond to hyper- polarization and which phases correspond to de- polarization Outside Outside Inside Inside Outside Inside Outside 1 Outside Inside Inside