rate of transportVmax1/2Vmaxtransporter-mecateddiffusionKmsimplediffusionconcentration oftransported moleculeThe graph at left shows rates of movementacross a cell membrane for a substancethat uses simple diffusion (green) and atransport mechanism (red). Which of thefollowing is TRUE about the transporters atthe point shown by the arrow?A. The transporter proteins are operatingmore slowly than at lowerconcentrations.B. The transporter proteins are operatingas fast as possible.C. The transporters proteins shut off at thatconcentration.D. The rate slows because transporterproteins run out of ATP.

Diffusion across a membrane is the process by which a substance moves from a region of higher…

Answered: rate of transport Vmax 1/2Vmax…

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 5UC

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B) Rate of transport into the cll A or B 10 20 30 40 Time (min) The graph directly above shows the rate of substance transport over time when the cells that do not contain the compounds A, B, or C, are placed in 1 mM solutions of A, B, and C, respectively. Based upon these data which of the following is/are compatible modes of transport for substance A? (active transport, facilitated diffusion, simple diffusion) For substance B? For substance C?
During an investigation on membrane transport, a researcher exposed bacterial cells to different concentrations of two different solutes: A and B. The rate of transport of each solute into cells isrepresented in the graphSolute ASolute BSolute ConcentrationWhich of the following best explains the greater rate of transport for solute A than for solute B at higher solute concentrations?A Solute A is being transported by simple diffusion, which does not rely on membrane proteins to control the rate of transportSolute A is being transported by active transport, which uses ATP and has higher rates of transport than passive transportSolute A is being transported by facilitated diffusion, which uses membrane proteins to increase the rate of transportRate of Transport
The average time it takes for a molecule to diffuse adistance of x cm is given byt = x2/2D where t is the time in seconds and D is the diffusioncoefficient. Given that the diffusion coefficient ofglucose is 5.7 × 10−7cm2/s, calculate the time it wouldtake for a glucose molecule to diffuse 10 μm, which isroughly the size of a cell.
Match the transport mechanisms with their descriptions. (1) diffusion (2) facilitated diffusion (3) filtration (4) active transport (5) endocytosis (6) exocytosis A. the cell membrane engulfs a particle or substance, drawing it into the cell in a vesicleB. movement down the concentration gradient with a carrier protein, without energy inputC. movement down the concentration gradient without a carrier protein or energy inputD. a particle or substance leaves a cell in a vesicle that merges with the cell membraneE. movement against the concentration gradient with energy inputF. hydrostatic pressure forces substances through membranes
Define: simple diffusion, facilitated diffusion, primary active transport, secondary active transport and cotransport (by sure to address symport and antiport) . please explain this iin one sentense for each one please. note: I do not want more than one sentense
Solution A is hyperosmotic to solution B. If solution A is separatedfrom solution B by a selectively permeable membrane, does watermove from solution A into solution B, or vice versa? Explain
Imagine a hypothetical cell with a higher concentration of glucose inside the cell thanoutside. Answer the following questions about this cell, assuming all transport acrossthe membrane is passive, not active.a. Can the glucose simply diffuse across the cell membrane? Why or why not?b. If there are glucose transport proteins in the cell membrane, which way wouldglucose flow- into or out of the cell? Explain your answer.c. If the concentration of glucose was equal inside and outside of the cell, do you thinkthere would be a net flow of glucose across the cell membrane in one direction orthe other? Explain your answer.
Vesicle transport occurs between the ER and the Golgi in bothdirections. Let’s suppose a researcher added a drug to cells thatinhibited vesicle transport from the Golgi to the ER but did not affectvesicle transport from the ER to the Golgi. If you observed cellsmicroscopically after the drug was added, what would you expect to seehappen over the course of 1 hour?a. The ER would get smaller, and the Golgi would get larger.b. The ER would get larger, and the Golgi would get smaller.c. The ER and Golgi would stay the same size.d. Both the ER and Golgi would get larger.e. Both the ER and Golgi would get smaller
Describe primary and secondary active transport across a membrane, includingdetails of the major differences between these mechanisms.
Cells transporting substances across their membranes is essential. Choose TWO of the following types of cellular transport. ๏osmosis ๏active transport ๏facilitated diffusion ๏endocytosis / exocytosis (a)For each type of transport you choose, describe the transport process. Explain how the organization of cell membrane plays a role the movement of specific molecules across membrane. (b)Using the same transport types, identify a specific cell that utilizes that type of transit (i.e. one cell for each transport type, or two different cell examples), and detail a substance that is transferred. (c)A typical human lymphocyte has a radius of about 10 μm, while a typical bacterium (e.g., S. pneumoniae) has a radius of about 1 μm. Assuming that both cell types are perfectly spherical, compare and contrastthe transport mechanisms for each of these cells.
the maximal rate of solute movement during diffusion is greater than during mediated transport true or false?
What are the similarities and differences between themathematical equation for the rate of simple solute diffusion andthe equation for the rate of osmosis?

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