Pearson eText Biology: Science for Life -- Instant Access (Pearson+)
6th Edition
ISBN: 9780135214084
Author: Colleen Belk, Virginia Maier
Publisher: PEARSON+
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Textbook Question
Chapter 3, Problem 2LTB
Add labels to the figure that follows, which illustrates some molecules that can and cannot pass through cell membranes unaided.
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Imagine that a cell has a plasma membrane made ONLY of phospholipids and contains no proteins. Classify the molecules listed below
according to whether or not they are likely to diffuse across the plasma membrane.
Fatty acids
Rapid Diffusion
Across the Plasma
Membrane
Slow/No Diffusion
Across the Plasma
Water
Membrane
Oxygen
Glucose
Ca2+
Steroid
hormones
Compare and contrast the four basically different ways that a substance can move across the plasma membrane. Present it in a matrix.
Draw and label a cell lipid bilayer and diagram how the following transport processes take place: passive diffusion of oxygen into the cell, facilitated diffusion of potassium into the cell, active transport of sucrose into the cell. Using different symbols (circles for oxygen, squares for sucrose, and triangles for potassium ions), show the relative concentrations (gradients) of these substances on the inside and outside of the cell. For example, to show that oxygen enters the cell by going “down” its gradient, you would draw more circles on the outside of the cell than inside the cell. Be sure to show and label membrane proteins when appropriate, and show the electric membrane potential using “+”s (pluses) on one side and “-”s (minuses) on the other side of the membrane. Also show the proton pump which uses ATP as a source of energy.
Chapter 3 Solutions
Pearson eText Biology: Science for Life -- Instant Access (Pearson+)
Ch. 3 - Prob. 1LTBCh. 3 - Add labels to the figure that follows, which...Ch. 3 - Prob. 3LTBCh. 3 - Which of the following is not a function of water?...Ch. 3 - Prob. 5LTBCh. 3 - Prob. 6LTBCh. 3 - Prob. 7LTBCh. 3 - Prob. 8LTBCh. 3 - Which of the following forms of membrane transport...Ch. 3 - Prob. 10LTB
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Besides lipid molecules, cell membranes also contain many different types of proteins, each with specific functions. In the following table, select the common type of membrane protein in the right-hand column that each statement in the left-hand column describes. The choices on the Type of Membrane Protein are the same for theFunction of the Membrane Proteinarrow_forwardDraw a lipid bilayer, and focus on three lipids that are on the same side of the membrane. Color in the areas where you expect the hydrophobic interactions, and in another color, shade in the areas that are hydrophilic. Draw another lipid bilayer, and for this one, include two membrane proteins. One of them should be an integral membrane protein and the other one a peripheral membrane protein. Label the lipid bilayer, the side the faces the cytoplasm and the side that faces outside the cell. Also label the two proteins, and shade in the areas where you predict that you would find hydrophobic amino acids and hydrophilic amino acids.arrow_forwardmultiple choicearrow_forward
- According to the fluid mosaic model of cell membranes, which of the following is a true statement about membrane phospholipids? They frequently flip-flop from one side of the membrane to the other. They have hydrophilic tails in the interior of the membrane. They can move laterally along the plane of the membrane. They are free to depart from the membrane and dissolve in the surrounding solution.arrow_forwardSketch out a cross section of a cell membrane showing the a proposed transporter involved in either diffusion or active transport. Include and label the following phospholipid bilayer show head group and tails .hydrophilic and hydrophobic region labeledarrow_forwardThe cytoplasm of a certain cell is composed of a solution that is 98% water, 2% solutes. Consider the solution shown in the beaker in this picture: FOOE OOS Foor solution. [Select] Cytoplasm is 98% water, 2% solutes. The solution in the beaker would be considered when compared to [Select] The plasma membrane is impermeable to solutes. Beaker solution is 98% water, 2% solutes the cell. We would expect that the cell would [Select] if it was placed in the would account for whatever changes might occur to the volume of the cytoplasm of the cell when it is placed in the solution.arrow_forward
- Each diagram shows a cell with a semipermeable membrane submerged in a solution. Solutions contain different amounts of solutes (glucose, sodium). The membrane is NOT permeable to glucose or sodium.arrow_forwardThe fluid mosaic model of the membrane describes the membrane as: containing a significant quantity of water in the interior composed of fluid phospholipids on the outside and protein on the inside composed of proteins on the outside and phospholipids on the inside made of proteins embedded into a fluid phospholipid bilayerarrow_forwardWhich of the following statements about a typical plasma membrane is correct? The hydrophilic interior of the membrane is composed primarily of the fatty acid tails of the phospholipids. Carbohydrates on the membrane surface are important in determing the overall bilayer structure. Phospholipids are the primary component that determines which solute can cross the plasma membrane. The two sides of the plasma membrane have different lipid and protein composition. The plasma membrane is covalently linked network of phospholipids and proteins that controls the movement of solutes into and out of a cell.arrow_forward
- The plasma membrane consists mainly of: A Proteins embedded in a carbohydrate bilayer B Phospholipids embedded in a protein bilayer C Proteins embedded in a phospholipid bilayer D Proteins embedded in a polymer of glucose moleculesarrow_forwardExplain (using the correct terminology and drawing an image) what happens to the cells in the following environments: A human blood cell (0.9% salt) is placed in a saltwater tank (27.5% salt). - A bacterial cell with 35% organic material in their cytoplasm is living in a tank filled with 35% sulfur. - A freshwater plant cell (75% water) is living in a pond that floods over.arrow_forwardFill in the blanks with the following words: diffusion, endocytosis, solute pump, osmosis. The type of active transport in which sodium and potassium are pumped across a membrane using ATP is called a This passive process is where water moves in and out of a cell The type of passive process in which molecules move across the plasma membrane down a concentration gradient is called This process is where the cell engulfs extracellular substances by phagocytosis or pinocytosisarrow_forward
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The Cell Membrane; Author: The Organic Chemistry Tutor;https://www.youtube.com/watch?v=AsffT7XIXbA;License: Standard youtube license