What is responsible for action potentials propagating in one direction? The inactivation of voltage gated sodium channels The sodium potassium pump and the potassium leak channels The inactivation of voltage gated potassium channels The inactivation of ligand gated sodium channels The inactivation of ligand gated potassium channels

What is responsible for action potentials propagating in one direction? The inactivation of voltage gated sodium channels The sodium potassium pump and the potassium leak channels The inactivation of voltage gated potassium channels The inactivation of ligand gated sodium channels The inactivation of ligand gated potassium channels

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 2VCQ: Figure 35.11 Potassium channel blockers, such as amiodarone and procainamide, which are used to...

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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.
Figure 35.11 Potassium channel blockers, such as amiodarone and procainamide, which are used to treat abnormal electrical activity in the heart, called cardiac dysrhythmia, impede the movement of K+ through voltage-gated K+ channels. Which part of the action potential would you expect potassium channels to affect?
Neurotransmitters are released from neurons due to the opening of ____________. Select one: a. voltage gated Na channels b. voltage gated K channels c. voltage gated Ca channles d. voltage gated Cl channels e. voltage gated proton channels
The membrane potential labeled (0) is due to which of the following (when compared to (3) potential. (A) voltage-gated Na+ channels (B) voltage-gated K+ channels (C) voltage-gated slow Ca++ channels (D) voltage-gated fast Ca++ channels (E) voltage-gated transient Ca++ channels (F) funny channels
Which of the following occurs first when voltage reaches the threshold level in a neuron plasma membrane? (a) voltageactivated Na1 channels open (b) K1 channels open (c) the membrane hyperpolarizes (d) neurotransmitter is released (e) K1 channels close
Which of the following is/are true about action potentials? Select all correct asnwers. Group of answer choices always has the same amplitude (amount of depolarization) always has the same duration information is coded through the frequency of action potentials action potentials can sum toge
What membrane protein of the neuron is responsible for briefly increasing the Na+ permeability of the membrane during the rising phase of the nerve impulse? the sodium-potassium pump the voltage gated potassium channel the voltage gated sodium channel the stimulus gated sodium channel the ligand gated ion channels
An influx of positive sodium ions causes opening of the activation gates of voltage regulated sodium channels resulting in a further influx of positive sodium ions, and thus the initial stages of an action potential are regulated by ______ feedback.
Would anyone be able to explain these different channels? I would like an explanation as to why voltage gated membranes are associated with axon membranes (although it's prob because of membrane potential differences and depolarization/hyperpolarization?), why ligand gated channels are primarily at synapses (via neurotransmitters?), etc.
An action potential begins when______ . a. a neuron reaches threshold potential b. voltage-gated potassium gates open c. voltage-gated sodium gates close d. sodium–potassium pumps stop operating
Which of the following is the most direct result of depolarizingthe presynaptic membrane of an axon terminal?(A) Voltage-gated calcium channels in the membrane open.(B) Synaptic vesicles fuse with the membrane.(C) Ligand-gated channels open, allowing neurotransmittersto enter the synaptic cleft.(D) An EPSP or IPSP is generated in the postsynaptic cell.
If a neurotransmitter binds to a receptor that opens potassium channels, the result is ... Group of answer options ... that an IPSP is formed. . .. that an EPSP is formed. ... no change in membrane potential.