I need help please The paddle-like, charged transmembrane domains of potassium channels mayconfer ion selectivity to the channel.enable the aggregation of channel subunits into functional channels.O dehydrate the ions as they cross the membrane.serve as a plug or inactivation gate.be the primary voltage sensors. Which evidence supports the assertion that the macroscopic Na + current is the sum ofmany microscopic Na + currents?All of the other choicesTetrodotoxin blocks macroscopic, but not microscopic, currents.Opening and closing of Na + channels is concentration-dependent.The averaged collective response of single channels resembles the time course of the macroscopiccurrent.The probability of a Na+ channel opening increases as the membrane is hyperpolarized.

The first question is about the role of the paddle-like, charged transmembrane domains of potassium…

The paddle-like, charged transmembrane domains of potassium channels may confer ion selectivity to the channel. enable the aggregation of channel subunits into functional channels. O dehydrate the ions as they cross the membrane. serve as a plug or inactivation gate. be the primary voltage sensors.

The paddle-like, charged transmembrane domains of potassium channels may confer ion selectivity to the channel. enable the aggregation of channel subunits into functional channels. O dehydrate the ions as they cross the membrane. serve as a plug or inactivation gate. be the primary voltage sensors.

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 1RE: Conformational changes in channel proteins brought about by voltage changes are responsible for...

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Concept explainers

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.

Question

I need help please

The paddle-like, charged transmembrane domains of potassium channels may
confer ion selectivity to the channel.
enable the aggregation of channel subunits into functional channels.
O dehydrate the ions as they cross the membrane.
serve as a plug or inactivation gate.
be the primary voltage sensors.

Which evidence supports the assertion that the macroscopic Na + current is the sum of
many microscopic Na + currents?
All of the other choices
Tetrodotoxin blocks macroscopic, but not microscopic, currents.
Opening and closing of Na + channels is concentration-dependent.
The averaged collective response of single channels resembles the time course of the macroscopic
current.
The probability of a Na+ channel opening increases as the membrane is hyperpolarized.

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