Biology: Science for Life with Physiology (5th Edition)
5th Edition
ISBN: 9780321922212
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 3, Problem 2LTB
Summary Introduction
To describe:
Three common substances, which can easily pass through the cell membrane.
Introduction:
The cell membrane is the outer layer boundary of every cells. It is made up of phospholipids and is semipermeable to the substances. It acts as a barrier between the internal and the external environment of the cell.
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discuss the following statement: “the structure and function of a living cell are dictated by the laws of physics and chemistry.”
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Chapter 3 Solutions
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- Identify the polar, inorganic molecule which can pass freely through the plasma membrane. CH3CH2OH (ethanol) C6H12O6 (glucose) H2O (water) C6H6 (benzene) CO2 (carbon dioxide)arrow_forwardIdentify the nonpolar, inorganic molecule which can pass freely through the plasma membrane. CH3CH2OH (ethanol) CO2 (carbon dioxide) C12H22O11 (sucrose) C6H12O6 (glucose) C6H6 (benzene)arrow_forwardList three functions of membrane proteins.arrow_forward
- The 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_forwardDescribe the structure and function of the three types of junctions found between cells.arrow_forwardWhat types of substances diffuse most readily through a cell membrane?arrow_forward
- Would substances be able to pass through the plasma membrane if the phospholipid tails of the plasma membrane were both saturated fatty acids? No, saturated fatty acids would cause the plasma membrane to loss the fluidity it has by having some unsaturated fatty acids present. No, saturated fatty acids would cause the plasma membrane to be more fluid. Yes, saturated fatty acids would cause the plasma membrane to be a solid versus liquid. Answer not listed.arrow_forwardIdentify how each of the following would pass through the plasma membrane: gases, large polar molecules, charged molecules (like ions), hydrophobic molecules, and small polar molecules. Be specific.arrow_forward2) Explain how the following cell transport systems work moving materials around inside the cell and other functions. Focus on structure and function, and Include how energy is used to accomplish these movements. A)Tubulin/Kinesin B)Actin/Myosinarrow_forward
- Discuss the five ways substances can pass across the cell membrane. Give examples of eacharrow_forwardDescribe the nature of the plasma membrane inreference to the passage of materials through itarrow_forwardWhich of the following statements describes the function of plasma membranes? I. define boundaries of the cell and its organelles and act as permeability barriers II. sites for specific biological and chemical functions III. possess transport proteins that regulate the movement of substances into and out of the cell and its organelles IV. contain protein molecules that act as receptors to detect external signals V. provide mechanisms for cell-to-cell contact, adhesion, and communicationarrow_forward
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