1. Types of transport of substances through the membrane: passive transport (facilitated diffusion through the biomembrane, its mechanism and features. Channel proteins and transporter proteins, their importance).

1. Types of transport of substances through the membrane: passive transport (facilitated diffusion through the biomembrane, its mechanism and features. Channel proteins and transporter proteins, their importance).

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 1TAHL: Which of the following methods of transport is being used to transfer the substance into the cell in...

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Concept explainers

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.

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1. Types of transport of substances through the membrane: passive transport (facilitated diffusion through the biomembrane, its
mechanism and features. Channel proteins and transporter proteins, their importance).

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The principal force driving movement in diffusion is______. a. temperature b. particle size c. concentration gradient d. membrane surface area
What is NOT true about diffusion: 1. A form of passive transport. 2. Uses adenosine triphosphate to transport substances across the plasma membrane. 3. Tendency of molecules to move from an area of higher concentration to an area or lower concentration. 4. Classified as either facilitated diffusion or simple diffusion.
Types of substance transports through the membrane: secondary active transport (mechanism and features, symports, antiports, uniports).
1. Fill out the following chart comparing different mechanisms of transport across a plasma membrane: Simple Facilitated Secondary Primary Active Diffusion Diffusion Active Transport Transport Types of molecules transported? (List size, polarity, charge) Requires a carrier or channel protein? (Yes/No) Requires an additional energy source? (Yes/No) Do any molecules travel against their concentration or electrochemical gradients? (Yes/No)
1. Define osmosis, simple diffusion, facilitated diffusion. 2.. Identify why each of these is a form of passive transport. 3. Give examples of each type of passive transport.
Which of the following statements about active processes of membrane transport is true? cellular energy is required substances move against its concentration gradient all requires the aid of proteins during transport a and b a, b, and c
Which of the following is a characteristic of facilitated diffusion (passive transport) of a molecule across a membrane? OOO The rate of transport is saturable. It is highly specific for the molecule being transported. All of the answers are correct. Its rate is higher than that of simple diffusion of the molecule. The direction of transport is determined by concentration and/or electrochemical gradients.
8. Define homeostasis. maintoining nterral balance 9. What role does the cell membrane play in maintaining homeostasis? 10. How is facilitated diffusion different from diffusion? How are they similar? 11. List two ways that active transport is different than passive transport. 1) 2) 12. Why is the sodium-potassium pump considered an active transport? Which direction are the sodium and potassium bing pumped? How many sodiums are being pumped? How many potassiums are being pumped?
Explain why biological membranes are said to be selectively permeable or semipermeable. Address how materials like amino acids, carbohydrates, ions and water can pass through the biological membrane. Be sure to talk about the similarities and differences between diffusion, facilitated diffusion, osmosis and active transport.
Which of the following statements about passive processes of membrane transport is false? cellular energy is not required substances move along its concentration gradient all require the aid of proteins during transport a and b a and c
Descibe each process and how it transports across plasma membrane. Selectively permeable Carrier-mediated vs. noncarrier-mediated transport Passive vs. active transport
Rate of diffusion through a membrane is: Group of answer choices Inversely proportional to the surface area of the membrane. Directly proportional to the thickness of the membrane. Directly proportional to the concentration gradient. All of the above.