Concept explainers
To determine: The direction of net movement of particles along their concentration gradient.
Concept introduction: Diffusion is a process that is characterized by the net transfer of molecules down a concentration gradient that results in the unsystematic movement of particles. There are two main types of diffusion namely simple diffusion and facilitated diffusion.
To determine: Whether the direction of the net movement of particles along their concentration gradient would be different in facilitated diffusion when compared with simple diffusion.
Concept introduction: Diffusion is a process that is characterized by the net transfer of molecules down a concentration gradient that results in the unsystematic movement of particles. There are two main types of diffusion namely simple diffusion and facilitated diffusion.
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Biology (MindTap Course List)
- how are simple diffusion and facilitated diffusion similar? how are they different? how are facilitated diffusion and active transport similar? how are they different?arrow_forwardWithout saturation of transport proteins and under the same concentration gradient how can the speed of simple diffusion be compared to the speed of facilitated diffusion?arrow_forwardDiffusion has maximal transport rate? True or False?arrow_forward
- In Chapters 11 & 12, the following examples of membrane transport proteins are given. Fill out the table with the correct answer for that particular transport protein. Type of transport protein (channel or carrier/transporter?) K* leak channel glucose transporter bacteriorhodopsin Na-K pump glucose-Na symport Na-H exchanger Performs active or passive transport? Energy source for movement of solute(s) or ion(s) Direction of movement of solute(s) or ion(s) with respect to the electrochemical gradient Na K* Na glucose Na H' Direction of movement of solute(s) or ion(s) with respect to the membrane crossed Na K₁ Na' glucose Na H' Is the protein a uniport, symport, antiport, or none of the above?arrow_forwardWhat are the two types of facilitated diffusion and how do they differ?arrow_forwardOne of the curves below describes nonmediated diffusion, and the other describes facilitated transport. Which is which? Explain your choices. Concentration difference across membrane Rate of transport -arrow_forward
- Show and explain three major differences between the simple and facilitated diffusion. Base your answer on energy requirement, detailed mechanism and the type of materials transported..arrow_forwardDiscuss the difference in the solute concentration gradient and rate of diffusion between simple diffusion and facilitated diffusion.arrow_forwardwhat are the two types of facilitated diffusion and what is an example of each?arrow_forward
- Differentiate between active transport and passive (simple) diffusion. (At least 4 differences)arrow_forwardCompare and contrast the following methods of a passing cell membrane in terms of movement with respect to the concentration gradient, use of ATP, and the use of transporters with examples. (Simple) diffusion vs Facilitated diffusionarrow_forwardCompare and fully explain simple diffusion and facilitated diffusion of solutes across a plasma membrane. How are they similar and how are they different? Your answer must include a discussion of concentration gradients, transport proteins and energy (ATP) requirements. Describe the general properties of molecules/solutes that exhibit each type of diffusion.arrow_forward
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning