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 Human Anatomy & Physiology (11th Edition) ISBN:9780134580999 Author:Elaine N. Marieb, Katja N. Hoehn Publisher:PEARSON Anatomy & Physiology ISBN:9781259398629 Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter Publisher:Mcgraw Hill Education, Human Anatomy ISBN:9780135168059 Author:Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, Jon Publisher:Pearson Education, Inc., Anatomy & Physiology: An Integrative Approach ISBN:9780078024283 Author:Michael McKinley Dr., Valerie O'Loughlin, Theresa Bidle Publisher:McGraw-Hill Education Human Anatomy & Physiology (Marieb, Human Anatomy... ISBN:9780321927040 Author:Elaine N. Marieb, Katja Hoehn Publisher:PEARSON Human Anatomy & Physiology (11th Edition) ISBN:9780134580999 Author:Elaine N. Marieb, Katja N. Hoehn Publisher:PEARSON Anatomy & Physiology ISBN:9781259398629 Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter Publisher:Mcgraw Hill Education, Human Anatomy ISBN:9780135168059 Author:Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, Jon Publisher:Pearson Education, Inc., Anatomy & Physiology: An Integrative Approach ISBN:9780078024283 Author:Michael McKinley Dr., Valerie O'Loughlin, Theresa Bidle Publisher:McGraw-Hill Education Human Anatomy & Physiology (Marieb, Human Anatomy... ISBN:9780321927040 Author:Elaine N. Marieb, Katja Hoehn Publisher:PEARSON membrane. They do so by interacting directly with the hydrophobic interior of the lipid bilayer.Very small polar molecules such as water and glycerol can pass directly through the membrane, but much more slowly than smallnonpolar molecules. The mechanism that permits small polar molecules to cross the hydrophobic interior of the lipid bilayer is notcompletely understood, but it must involve the molecules squeezing between the hydrophobic tails of the lipids that make up the bilayer.Polar molecules such as glucose and sucrose have very limited permeability.Large molecules such as proteins cannot pass through the lipid bilayer.Ions and charged molecules of any size are essentially impermeable to the lipid bilayer because they are much more soluble in waterthan in the interior of the membrane. Part C -Facilitated diffusion via channels and carrier proteinsThe majority of solutes that diffuse across the plasma membrane cannot move directly through the lipid bilayer. The passive movement of such solutes (downtheir concentration gradients without the input of cellular energy) requires the presence of specific transport proteins, either channels or carrier proteins.Diffusion through a transport protein in the plasma membrane is called facilitated diffusion.Sort the phrases into the appropriate bins depending on whether they are true only for channels, true only for carrier proteins, or true for bothchannels and carriers.Hint 1.What types of solutes do channels and carrier proteins transport? Which of the following statements correctly describes the specificity of these transport proteins for the solutes they transport? Hint 2.How carrier proteins are thought to accomplish transportUnlike channels, which are pores through the membrane, carrier proteins transport solutes across the membrane through a sequence of subtle shapechanges. Binding of a solute on one side of the membrane induces a conformational change, which exposes the solute binding site to the opposite sideof the membrane. Release of the solute from the binding site induces a conformational change that returns the protein to its initial shape.Hint 3.How transport proteins provide a hydrophilic path for polar or charged solutesCharged ions and polar molecules such as sugars and amino acids cannot diffuse directly through the lipid bilayer because they are much more stablein the strongly polar environment of water than in the hydrophobic interior of the bilayer. The structure of transport proteins enables them to movecharged and polar solutes across the plasma membrane.Transport proteins are integral membrane proteins with both hydrophobic and hydrophilic portions. The amino acids that are in contact with thehydrophobic interior of the lipid bilayer are nonpolar. In contrast, the amino acids composing the pore of a channel protein or the solute binding site of a Which of the following correctly describes some aspect of exocytosis or endocytosis?The correct answer is that a- Endocytosis and exocytosis involve active transport. Both endocytosis and exocytosis require the use of ATP for the cell to enclose the particles being brought in, or to move the vesicle out of the cell, this makes both of these processes active transport.
What type of molecules pass through channel proteins?Water molecules and ions move through channel proteins.
What determines whether a transport process is active or passive quizlet?Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
What name is given to the process by which water crosses a selectively permeable membrane quizlet?Osmosis is a type of diffusion. (Osmosis is the diffusion of water across a selectively permeable membrane.)
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Sort the phrases into the appropriate bins depending on whether they are true only for channels
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