Active transport Select one: a. is non-specific in terms of substrates that are transported. b. transports a substrate against its concentration gradient. c. is the type of transport used by aquaporins. d. directly involves ATP hydrolysis

Active transport Select one: a. is non-specific in terms of substrates that are transported. b. transports a substrate against its concentration gradient. c. is the type of transport used by aquaporins. d. directly involves ATP hydrolysis

Body Structures & Functions Updated

13th Edition

ISBN:9780357191606

Author:Scott

Publisher:Scott

Chapter17: Respiratory System

Section: Chapter Questions

Problem 2RQ

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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

Active transport

Select one:

is non-specific in terms of substrates that are transported.

transports a substrate against its concentration gradient.

is the type of transport used by aquaporins.

directly involves ATP hydrolysis.

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