In nervous system, electrical signals originating within one cell can diffuse into a neighbouring cell as chemical signals through The depolarization phase of action potentials in neurons is due primarily to flow into the cell (ion)

In nervous system, electrical signals originating within one cell can diffuse into a neighbouring cell as chemical signals through The depolarization phase of action potentials in neurons is due primarily to flow into the cell (ion)

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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Question

Fill the blank :

In nervous system, electrical signals originating within one cell can diffuse into a neighbouring
cell as chemical signals through
The depolarization phase of action potentials in neurons is due primarily to
flow into the cell
(ion)

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When action potentials arrive at a synapse between a neuron and another cell, they stimulate the release of molecules of a ________ that diffuse over to that cell.
The accelerating flow of _______ ions through gated channels across the membrane triggers an action potential. a. potassium b. sodium c. hydrogen d. a and b
A neuron responds to adequate stimulation with _______, a type of self-propagating signal.
The membrane potential caused by differences in ions across the plasma membrane of an electrically excitable cell (when not stimulated) is called: action potential resting membrane potential graded potential local potential
Which of these ions is actively transported through the cell membrane to re-establish a resting potential? K and Mg Na and K Mg and Cl Ca and Cl
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
Membrane permeability at the rising phase of an action potential is dominated by: O Co-transporters Nongated Channels O K+ Voltage-gated Channels O Na+ voltage-gated Channels O Chemically-gated Channels
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
Which of the following occurs immediately after the peak of an action potential? The membrane potential begins to repolarize O Voltage gated potassium channels are open Ⓒ Voltage gated sodium channels are inactivated The cell is in the absolute refractory period All of the above
After an action potential, the opening of voltage-gated ________ channels and the inactivation of sodium channels, cause the membrane to return to its resting membrane potential. disodium potassium calcium chloride acetylcholine
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
During the _____ phase of an action potential, the membrane potential is more positive than the resting potential, but potassium is leaving the cell and sodium is no longer entering, so membrane potential is _____.