Concept explainers
To describe:
The methods of membrane transport, and suggest which substances are transported by each method.
Also, write about if the method of transport is active or passive, assisted or unassisted.
Introduction:
Any substance that passes between cells and the enveloping extracellular fluid must possess the tendency to pass through the plasma membrane. If a component can pass through the membrane, the membrane is considered permeable for that component, however, in case if the component cannot pass, then the membrane is considered impermeable to it. The plasma membrane possesses the tendency of selective permeability, that is, it allows some of the particles to go through while inhibiting the others.
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Chapter 3 Solutions
Human Physiology: From Cells to Systems (MindTap Course List)
- List the means of unassisted membrane transport.arrow_forwardDescribe the contribution of each of the following to establishing and maintaining membrane potential: (a) the Na+K+ pump, (b) passive movement of K+ across the membrane, (c) passive movement of Na+ across the membrane, and (d) the large intracellular anions.arrow_forwardDefine the difference between passive transport and active transport, and give examples of each. Each example should specify the type of cell, the name of the membrane protein(s), and the substance that is being transported.arrow_forward
- Briefly discuss what membrane facilitated transport is ,and distinguish between the different typesarrow_forwardDescribe the different types of membrane transport. Which require energy, and which are passive?arrow_forwardC. Define the difference between passive transport and active transport, and give examples of each. Each example should specify the type of cell, the name of the membrane protein(s), and the substance that is being transported.arrow_forward
- Describe the fluid properties of the cell membrane and explain how membrane fluidity is influenced by membrane composition.arrow_forwardDefine membrane transport proteins.arrow_forwardDescribe in details the processes of active transport, including the concepts of pumps, primary active transport, secondary active transport, symports, and antiports. Indicate the sources of energy for moving solutes against their concentration gradients.arrow_forward
- Describe primary and secondary active transport across a membranearrow_forwardIn general, what is the relationship between membrane fluidity and membrane permeability?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_forward
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning