Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Textbook Question
Chapter 5, Problem 2FTB
A membrane that is permeable to some substances but not to others isdescribed as being ____. The movement of a substance through a membrane down its concentration gradient is called ____. When applied to water, this process is called ___. Channels that are specific for water are called _______. The process that moves substances through a membrane against their concentration gradient is called _____.
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Students have asked these similar questions
The movement of water is called osmosis. Osmosis is the diffusion of water, and it too moves to reach equilibrium.
The relationship between solute concentration and water are opposite. An area with high concentration of solute has less water "concentration", and an area of low solute concentration has a higher water "concentration".
Select the options that describe the movement of water if there is a gradient across a membrane.
Hint:
There are two correct answers. One with the solute perspective and one with a water perspective.
Select all that apply:
Water moves from an area of high solute concentration to an area of low solute concentration.
Water moves from an area of low solute concentration to an area of high solute concentration.
Water moves from an area of high water "concentration" to an area of low water "concentration".
Water moves from an area of low water "concentration" to an area of high water "concentration".
In each picture, mark a plus + where the water concentration is higher, and a minus - where it is lower.
An isotonic solution has the/a ____ concentration of water as the cell and the/a ____ concentration of solute as the cell
different, different
partial, partial
same, different
different, same
same, same
Chapter 5 Solutions
Biology: Life on Earth
Ch. 5 -
1. Membranes consist of a bilayer of ________....Ch. 5 - A membrane that is permeable to some substances...Ch. 5 - Facilitated diffusion involves either _____...Ch. 5 - Prob. 4FTBCh. 5 -
5. After each molecule, place the two-word term...Ch. 5 - Prob. 6FTBCh. 5 - Describe and diagram the structure of a plasma...Ch. 5 - Prob. 2RQCh. 5 - What are the five categories of proteins commonly...Ch. 5 - Prob. 4RQ
Ch. 5 -
5. Define hypotonic, hypertonic, and isotonic....Ch. 5 -
6. Describe the following types of transport...Ch. 5 - Name the protein that allows facilitated diffusion...Ch. 5 - Imagine a container of glucose solution, divided...Ch. 5 - Prob. 9RQCh. 5 -
1. Different cells have different plasma...Ch. 5 - Predict and sketch the configuration of...Ch. 5 - The fluid portion of blood, in which red blood...Ch. 5 - Some cells in the nervous system wrap themselves...
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- The passive movement of a solute through a membrane protein down its concentration gradient is an example of _________. a. osmosis b. active transport c. endocytosis d. diffusionarrow_forwardThe principal force driving movement in diffusion is______. a. temperature b. particle size c. concentration gradient d. membrane surface areaarrow_forwardA solution of water and dissolved ions is separated by a selectively permeable membrane that allows the passage of water but not small ions. The concentration of sodium is higher on one side of the membrane than onthe other side. However, there is no net movement of water across the membrane. How is this possible?arrow_forward
- If a cell is placed in a solution that has the same concentration of solutes as in its cytoplasm, the solution is referred to as: O Isotonic Hypertonic O Hypotonic Osmoticarrow_forwardA cell is placed in a hypertonic medium triggering its regulatory volume control mechanism. Which of the following statements best describes the main ion movement responsible for the regulatory volume control in this situation? Efflux of K+ from the cytosol. Efflux of Na+ from the cytosol. Influx of Na+ into the cytosol. Influx of K+ into the cytosol.arrow_forwardA substance moving across a membrane against a concentration gradient is moving by: active transport facilitated diffusion passive transport osmosisarrow_forward
- In osmosis, water flows from hypertonic/hypotonic/isotonic solutions to hypertonic/hypotonic/isotonic solutions, until both solutions are hypertonic/hypotonic/isotonic.arrow_forwardOne system consists of a permeable membrane with an intracellular concentration greater than the extracellular concentration. A second system is a semi-permeable membrane with intracellular concentration less than the extracellular concentration. Describe the solution type for each system. Group of answer choices The permeable membrane is hypotonic, the semi-permeable membrane is isotonic. Both systems are isotonic. The permeable membrane is isotonic, the semi-permeable membrane is hypertonic. The permeable membrane is isotonic, the semi-permeable membrane is hypotonic. The permeable membrane is hypertonic, the semi-permeable membrane is isotonic.arrow_forwardSimple diffusion is ____________ movement of water down concentration gradient using a protein channel movement of materials against their concentration gradient movement of one substance against, and one substance down their concentration gradients movement of molecules from high concentration to low concentration using no protein channels movement of materials down their concentration gradient using a protein channelarrow_forward
- Two aqueous solutions that differ in solute concentration are placed on either side of a semi permeable membrane. Osmosis is allowed to take place. The water will: move towards the side with higher solute concentration move towards the side with higher water concentration move equally in both directions not cross the membranearrow_forwardThe beaker in the diagram has a selectively permeable membrane separating two solutions. Assume that the salt molecules can pass freely through the membrane. Will the water level on either side of the membrane change? Explain your answer.arrow_forwardWhich of the following best describes diffusion (passive transport)? Group of answer choices: Net movement of molecules from an area of low concentration to an area of high concentration. Net movement of fluids from the environment into and out of an organism. Net movement of molecules from an area of high concentration to an area of low concentration. Net movement of molecules between cells.arrow_forward
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