Compare channels and transporters. Channels are __________, and transporters are __________.Select one:a.slower, more selectiveb.Less selective, slowerc.faster, less selectived.slower, less selectivee.more selective, faster

Channels are pores that allow the movement of ions through the membrane, whereas transporter is…

Science

Biology

Compare channels and transporters. Channels are __________, and transporters are __________. Select one:

Compare channels and transporters. Channels are , and transporters are . Select one:

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 3RE

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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

Compare channels and transporters. Channels are __________, and transporters are __________.

Select one:

slower, more selective

Less selective, slower

faster, less selective

slower, less selective

more selective, faster

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Assume that a membrane permeable to Na+ but not to Cl- separates two solutions. The concentration of sodium chloride on side 1 is higher than on side 2. Which of the following ionic movements would occur? a. Na+ would move until its concentration gradient is dissipated (until the concentration of Na+ on side 2 is the same as the concentration of Na+ on side 1). b. Cl- would move down its concentration gradient from side 1 to side 2. c. A membrane potential, negative on side 1, would develop. d. A membrane potential, positive on side 1, would develop. e. None of the preceding is correct.
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The proteins that constantly transport sodium ions outside the membrane is called A. Membrane pump B. Calcium-potassium pump C. Sodium-potassium pump D. Glucose-potassium pump E. Protein-potassium pump The process in the question above gets its energy from A. ADP B. ACT C. PTA D. ATP E. TPA
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
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Explain how channels are able to rapidly move ions across membranes, and how they achieve ion selectivity.
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In the figure below are several panels that illustrate the relative concentration of a particular solute on either side of a cell's plasma membrane. The top panel represents the INITIAL (or starting) scenario, and the lower panels represent different possible outcomes after time has passed. QUESTION: Which of the panels below represents a situation in which the concentration gradient of this solute has been minimized (reduced)? A B C D