Q: A hypothetical cell has a higher concentration of sodium ions outside the cell than inside the cell…
A: A solution is said to be a homogeneous mixture of two or more components in any one phase(solid,…
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Q: What is the relationship between concentration gradient and active and passive transport?
A: The concentration gradient is the difference in the concentration of a substance across the…
Q: List the major factors that can cause the net movement of ions across a membrane?
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Q: What is receptor-mediated transport? Explain.
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A: Biological membranes cover the cells and maintain their interior.
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A: Introduction - There is multiple factors that result in membrane Fluidity. First, the mosaic…
Q: How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it…
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Q: How do neutral solutes move across the plasma membrane? Can the polarmolecules also move across it…
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Q: What is the result of opening a membrane ion channel?
A: Ion channels are the proteins in the membrane of all living cells that provide a passage to the…
Q: What is the primary difference between passive and active transport in terms of concentration…
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Q: What might determine the value for the maximal flux of a mediated transport?
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Q: What is membrane fluidity?
A: Membrane can be defined as the thin layer which surrounds the living cell. The internal components…
Q: what happens to cells when the concentrations of nonpenetrating solutes across the cell membrane are…
A: Solutes can be penetrating or non-penetrating based on their ability to cross the membrane present…
Q: Define the term Extracellular solute concentration?
A: The cell is the basic structural and functional unit of life. It carries out various functions in…
Q: Explain how tonicity relates to the direction of water movement across a membrane.
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Q: What determine the direction in which net diffusion of a nonpolar molecule will occur?
A: Diffusion is the random movement of molecules and has a net direction towards region of lower…
Q: Why is ATP required for active transport
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Q: The comparison of the simple diffusion, facilitated diffusion and active transport are shown in the…
A: Diffusion is the movement of molecules from a region of higher concentration to a region of lower…
Q: How does the intensity of simple diffusion vary in relation to the concentration gradient of the…
A: * simple diffusion is movement of molecules through a cell membrane without using any channels and…
Q: which are the general features of diffusion of solutes in the water?
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Q: How does the size of a solute affect the rate of diffusion?
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Q: Are symporters and antiporters always involved in active transport? Can't both solutes move in the…
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Q: How do neutral solutes moves across the plasma membrane?
A: The plasma membrane (also called cell membrane) is the outermost layer of the cell and regulates the…
Q: Where do random motion and active transport occur in cells? How do the velocities of vesicles moving…
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Q: What process can move a solute against its concentration gradient?
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Q: What factors affect the degree of membrane fluidity?
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Q: Describe the concentration differences for Na+ and K+that exist across the plasma membrane.
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Q: What is the function of pressure in osmosis?
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Q: In what ways can the net solute flux between two compartments separated by a permeable membrane be…
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Q: What advantages are there to using diffusion as a transport mechanism versus active transport of a…
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Q: a solution is hypotonic relative to a cell, how will water move?
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Q: What is the importance of the concentration gradient in passive transport?
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Q: How does the lipid solubility affect the permeability of solute through biological membranes
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Q: Solution A is hyperosmotic to solution B. If solution A is separatedfrom solution B by a selectively…
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Q: What type of transport is shown?
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Q: Define diffusion. How does this differ from osmosis?
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Q: how are intercellular and extracellular volume related? what determines net water flow (osmosis)?
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Q: What are the similarities and differences between themathematical equation for the rate of simple…
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Q: What determines the direction in which net diffusion of a nonpolar molecule will occur?
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Q: For the following modes of transport for membranes, tell whether the flow is with or against…
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Q: diffusion and osmosis
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Q: If a concentration gradient exists, solutes will move from high concentration to concentration?
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If the percent difference is a positive number, what does this tell us about the movement of water across the membrane?
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- Describe the contribution of each of the following to establishing and maintaining membrane potential: (a) the Na+K+ pump, (b) passive movement of K+ across the membrane, (c) passive movement of Na+ across the membrane, and (d) the large intracellular anions.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.What determine the direction in which net diffusion of a nonpolar molecule will occur?
- How do neutral solutes move across the plasma membrane? Can the polarmolecules also move across it in the same way? If not, then how are thesetransported across the membrane?In general, what is the relationship between membrane fluidity and membrane permeability?What is the diffusion of water across a membrane called?
- What forces drive solutes from one side of the membrane to the other?• What solute properties dictate its permeability?– Why can some solutes passively diffuse through the plasma membrane, and some cannot?What will happen to the cell volume and solute concentratuon if a cell that is normally in osmotic equilibrium was transferred to a more diluted concentration?If we intake very highly concentrated sugar/salt solution, then what types of osmotic effects may occur?
- In terms of rate of transport of a molecule across a membrane , what is the difference between passive and active transport?what happens to cells when the concentrations of nonpenetrating solutes across the cell membrane are changed?• What are the ionic differences between the extracellular and intracellular fluids? • Give the theory of the diffusion process.