BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 4, Problem 11WIO
Golden knifefish use an electric field to detect nearby objects and to communicate. Scientists know that ion channels in the membranes of the electric organ cells are largely responsible for generating the electric field. They also know that knifefish can quickly turn up or turn down the intensity of the electric field. What type of membrane transport might the knifefish use to quickly increase the number of ion channels in the cell membranes of its electric organ? What process would remove ion channels from the cell membranes?
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Chapter 4 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 4.1 - Describe how your body has potential and kinetic...Ch. 4.1 - Prob. 2MCCh. 4.2 - Prob. 1MCCh. 4.2 - Prob. 2MCCh. 4.2 - Prob. 3MCCh. 4.3 - Prob. 1MCCh. 4.3 - Describe the relationship between energy-requiring...Ch. 4.4 - Prob. 1MCCh. 4.4 - Prob. 2MCCh. 4.4 - What is the role of negative feedback in enzyme...
Ch. 4.4 - Prob. 4MCCh. 4.5 - Prob. 1MCCh. 4.5 - What types of substances diffuse freely across a...Ch. 4.5 - What would happen to a plant cell in a hypertonic...Ch. 4.5 - Prob. 4MCCh. 4.5 - Prob. 5MCCh. 4.5 - Prob. 6MCCh. 4 - Prob. 1MCQCh. 4 - How does ATP participate in coupled reactions? a....Ch. 4 - How do proteins contribute to the function of an...Ch. 4 - Prob. 4MCQCh. 4 - Prob. 5MCQCh. 4 - Prob. 6MCQCh. 4 - Prob. 7MCQCh. 4 - Prob. 8MCQCh. 4 - How does ATP relate to membrane transport? a. The...Ch. 4 - Prob. 1WIOCh. 4 - Prob. 2WIOCh. 4 - Prob. 3WIOCh. 4 - Prob. 4WIOCh. 4 - Use what you know about enzymes to propose an...Ch. 4 - Considering that enzymes are essential to all...Ch. 4 - Prob. 7WIOCh. 4 - Prob. 8WIOCh. 4 - Prob. 9WIOCh. 4 - List three ways the content in this chapter...Ch. 4 - Golden knifefish use an electric field to detect...Ch. 4 - Review Burning Question 4.4, which explains how...Ch. 4 - Prob. 1PITCh. 4 - Prob. 2PITCh. 4 - Prob. 3PITCh. 4 - Prob. 4PIT
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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
- 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.arrow_forwardWhen the nerves deliver a signal to contract, Ca++ (calcium ions) rush into the cell. The calcium ion influx causes specialized fibers to contract. Afterward, calcium ions are pumped out of the cell by calcium ATPases. What transport type(s) is occuring?s antiporter only ion gated transport followed by active transport active transport only ion gated transport only active transport followed by ion gated transportarrow_forwardPlasma membrane of neurons has various kinds of channels. Give your viewpoint why nature provided these to human beings?arrow_forward
- What is another way to answer this question Describe various examples of active transport. How is active transport different from passive transport? Without saying this: Active transport is when cells move against the flow/ concentration gradient, moving from low concentrations to high concentrations. Because of this, active transport requires ATP to work. Passive transport is different because it doesn't use much energy and moves from high concentration to a low concentration. Some examples of active transport are the Sodium-potassium pump ( the most well known one) where it takes sodium ions and pumps them outside of the membrane to let in potassium ions. Another one in plants is when a plant receives ions from the soil. The soil has a much lower concentration of ions than a plants root does, so ions have to move against the concentration gradient. Endocytosis and exocytosis are also forms of active transport. Where cells engulf its self around large molecules to bring…arrow_forwardThere are several membrane-bound organelles in cells (e.g. nuclei, mitochondria, endoplasmic reticulum) that can also have ion channels in their membranes. Sketch an electrical circuit model of a cell that expresses sodium, calcium, and chloride ion channels in its cellular membrane and calcium and chloride ion channels in its nuclear envelope membrane.arrow_forwardWhen the membrane is at rest, what are the forces acting on sodium ions?A. Both the concentration gradient and the electrical gradient tend to move sodium ions into the cell.B. Both the concentration gradient and the electrical gradient tend to move sodium ions out of the cell.C. The concentration gradient tends to move sodium ions into the cell, and the electrical gradient tends to move them out of the cell.D. The concentration gradient tends to move sodium ions out of the cell, and the electrical gradient tends to move them into the cell.arrow_forward
- Liver cells are in contact with the blood and exchange a variety of substances with the blood plasma (the noncellular part of blood). The concentration of water is equal in the cytoplasm of liver cells and in the blood plasma. Explain this observation in terms of membrane permeability and transport mechanisms. Animal cells typically maintain a higher concentration of Na+ outside the cell and a higher concentration of K+ inside the cell via the Na+-K+ pump. The drug ouabain inhibits the activity of the Na+-K+ pump. A nerve cell is incubated in ouabain. Predict what will happen to the concentrations of Na+ and K+ inside and outside the nerve cell as a result.arrow_forwardThe resting membrane potential is established by? The Na+/K+-ATPase pumping Na+ into the cell and K+ out of the cell The Na+/K+-ATPase pumping K+ into the cell and Na+ out of the cell A larger diffusion of K+ out of the cell compared to diffusion of Na+ into the cell A larger diffusion of K+ into the cell compared to diffusion of Na+ out of the cell a) and d) b) and c)arrow_forwardYour friend has made an artificial membrane to study ion concentration gradients in a laboratory and is confused after observing the ion concentration gradient in the image below. Initially (Time 1) there was a very strong concentration gradient across the membrane and your friend expected that ions would move until the concentrations were equal across the membrane. For a short time there was movement of ions but this soon stopped and there is no further change in the situation no matter how long you wait (see Time 2). Time 1 You friend is confused because there is still a strong concentration gradient and there are open ion channels available. So why don't the concentrations equalise? After thinking about it you realise that there must be some information that is incorrect or missing from the diagram above. Select the image below that explains why the ion concentrations remain unequal across the membrane Time 2 Select the correct image by clicking on it (you can only select one…arrow_forward
- List two ways that channels differ from transporters? What type of molecules do channels usually transport?arrow_forwardWhich of the following statements about ion channels is INCORRECT? Like carrier proteins, most channel proteins are specific regarding which molecules are allowed to pass. Channel proteins can have open or closed configurations. Unlike carrier proteins, some channel proteins are engaged in active transport of solutes. Channel proteins are used extensively in nerve cells, in which they are responsible for transduction of electrical signals. Compared to carrier proteins, channel proteins allow much faster transport.arrow_forwardWhich properties are characteristic of ion channels?a. They are usually lipids.b. They exist on one side of the plasma membrane, usually the intracellular side.c. They can open and close depending on the presence of any of three types of “gates.”d. They permit movement of ions against electrochemical gradients.e. They mediate facilitated diffusion.arrow_forward
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