Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 6.4, Problem 4R
Summary Introduction
To review:
The similarities and differences between active transport and facilitated diffusion.
Introduction:
The transfer of molecules across a membrane takes place either by the process of active or passive transport. The passive transport includes two types of diffusion, namely simple and facilitated diffusion.
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What is the difference between simple and facilitated diffusion? Facilitated by which type of molecule does the term “facilitated” mean?
What is the differences between simple and facilitated diffusion?
How are transmembrane potentials maintained in a leaky membrane?
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Life: The Science of Biology
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- how are simple diffusion and facilitated diffusion similar? how are they different? how are facilitated diffusion and active transport similar? how are they different?arrow_forwardwhat is simple and facilitated diffusion?arrow_forwardwhat are the two types of facilitated diffusion and what is an example of each?arrow_forward
- What characteristics distinguish simple diffusion from facilitated diffusion?arrow_forwardHow does facilitated diffusion differ from simple diffusion?arrow_forwardWhich of these answers explains why synaptic vesicles only releasee their neurotransmitter cargo in response to a signal? A) the necessary Rab proteins are not synthesized until an action potential arrives B) vesicle formation at the trans-Golgi network cannot occur in the absence of plasma membrane depolarization C) an additional protein, synaptotagmin, makes vesicle fusion dependent on the calcium concentration D)a plasma membrane transporter is needed to actively pump neurotransmitter into the synaptic cleft. These are inactive until membrane depolarizationarrow_forward
- Explain the differences between facilitated diffusion and grouptranslocation.arrow_forwardWhat would happen in each of the following cases where something related to intracellular transport is altered? Assume in each case that the protein involved is a soluble protein, not a membrane protein. State where each protein would be located and explain each of your answers. You add a signal sequence (for the Golgi) to the N-terminal end of a normally cytosolic protein. You change the hydrophobic amino acids in an ER signal sequence into other, hydrophobic, amino acids.arrow_forwardWhat would happen in each of the following cases where something related to intracellular transport is altered? Assume in each case that the protein involved is a soluble protein, not a membrane protein. State where each protein would be located and explain each of your answers. You change the hydrophobic amino acids in an ER signal sequence into negatively charged amino acids. You discover a protein that has both an ER signal sequence and a nuclear localization sequence. The ER signal sequence is at the N-terminus of the protein, and the nuclear localization sequence is located in the middle of the protein.arrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license