Question 10 of 10 A scientist designs an experiment in which the movement of polar molecules through a cell membrane is tested. He sets up the following two experiments n order to collect data on cell membrane permeability. What question is the scientist most likely trying to answer by conducting this experiment? Experiment 1 Experiment 2 polar molecules polar molecules lipid bilayer lipid bilayer proteins

Question 10 of 10 A scientist designs an experiment in which the movement of polar molecules through a cell membrane is tested. He sets up the following two experiments n order to collect data on cell membrane permeability. What question is the scientist most likely trying to answer by conducting this experiment? Experiment 1 Experiment 2 polar molecules polar molecules lipid bilayer lipid bilayer proteins

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 2TAHL: Assume that a membrane permeable to Na+ but not to Cl- separates two solutions. The concentration of...

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Chloride ions (Cl-) are in higher concentration outside of the cell compared to the intracellular fluid (ICF). If a cell is at rest and chloride-specific ion channels open, identify what would happen. Choose ALL of the correct answers. 1 Some chloride will enter the cell, but the concentration gradient for chloride will not change much. 2 The membrane will hyperpolarize 3 Chloride will come into the cell until it reaches chemical equilibrium. 4 The membrane potential won't change. 5 The membrane will depolarize 6 Some chloride will leave the cell, but the concentration gradient for chloride will not change much
Practitioners of naturopathic medicine often use “essential oils” such as lavender oil. (Note that essential refers to their essence or scent and does not imply that these substances are necessary for health.) One of the components of lavender oil is shown below. Based on its structure, could this molecule diffuse through the cell membrane of a skin cell after the oil was applied to the skin surface?
At this point, go over your answers to the activit ies given earlier in this lesson before you fill out the table below. Table 20: Interdependence of Function and Fom in the Cell Membrane Which components of the cell membrane enable it to perform this function? Function of the Cell Membrane How do these components help the cell membrane in performing this function? iully control the passage of substances through its membrane. However, all activit ort, involve energy. This leads us to another characte As stated in the first section of this lesson, maintaining homeostasis requires ise this in powering
Practitioners of naturopathic medicine often use “essential oils” such as lavender oil. (Note that essential refers to their essence or scent and does not imply that these substances are necessary for health.) One of the components of lavender oil is shown below. Based on its structure, could this molecule diffuse through the cell membrane of a skin cell after the oil was applied to the skin surface? Explain your answer
Would it be possible for small ions to passively diffuse (simple diffusion) across a selectively permeable membrane? Why? A Yes, because ions are highly non-polar in nature B Yes, because ions are highly polar in nature No, because it needs the aid of transport proteins to cross the membrane No, because not only transport proteins but also metabolic energy from ATP are needed to transport ions across the plasma membrane
The image below shows the movement of molecules across a plasma membrane. extracellular space lipid bilayer (cell membrane) TIMEI Source: LadyofHats small hydrophobic molecules intracellular space Using the image above, answer the following questions. (a) Identify the type of cell transport that is occurring in the image and justify your answer. (b) Explain the fluid mosaic model of the cell membrane as i relates to the movement of mole- cules illustrated in the figure. answer. (c) Predict the difference you would expect to see in the movement of illustrated molecules if they were to represent hydrophilic molecules rather than hydrophobic molecules. Justify your
Why is the Donnan membrane phenomenon important for the homeostasis of the cell?
Question 4 Which is NOT a characteristic of a cell membrane? is selectively permeable allows materials to enter and leave the cell encloses the contents of the cell is very rigid (stiff) LADIES DIARIAS MAS
Explain the Donnan Membrane Phenomenon. Why is it important for the homeostasis of the cell?
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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.