The transport process a cell uses depends on its specific needs. For example, glucose is required by both red plood cells and the epithelial cells in the gut, but one cell type uses facilitated diffusion while the other uses active transport. Hypothesize which cells would use which mode of transport. Explain your answer.

The transport process a cell uses depends on its specific needs. For example, glucose is required by both red plood cells and the epithelial cells in the gut, but one cell type uses facilitated diffusion while the other uses active transport. Hypothesize which cells would use which mode of transport. Explain your answer.

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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You have a beaker filled with a solution containing 2M glucose, 4M urea and 1M salt.Suspended in the solution is a cell that containing a solution of 1M glucose, 8M urea and 3Msalt. The membrane of the cell is permeable to glucose and salt but not urea. Answer each of thefollowing questions:a. Where will water move?b. Where will urea move?c. Where will glucose move?d. Where will salt move?e. What will happen to the volume of fluid inside the cell?f. What will happen to the osmolarity of the fluid inside the cell?
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Give typing answer with explanation and conclusion What are true regarding vesicles? Select one or more: a. move proteins and soluble cargo from the ER to the golgi and then final destinations. b. Select for specific glycosylated proteins c. move cargo in a "retrograde" fashion from the plasma membrane back to the golgi and then the ER. d. help proteins fold correctly.
How is active transport different from simple diffusion? Both active transport and simple diffusion transport molecules against the concentration gradient. In active transport, molecules are moved down the concentration gradient; on the B contrary, molecules to be transported in simple diffusion are moved against the concentration gradient. In active transport, molecules are transported with the aid of transport proteins; on the © other hand, molecules to be transported in simple diffusion do not need transport proteins. In active transport, molecules that are transported does not need metabolic energy; in contrast, molecules transported in simple diffusion need metabolic energy.
secondary active transport depends on which of the following principles? a. sodium is pumped out of the cell against a concentration gradient by primary active transport b. sodium moves out of the cell with a concentration gradient c. primary active transport is necessary to pump sodium into the cell from a higher to lower concentration d. diffusion causes sodium to move out of the cell
Explain the major difference between diffusion and osmosis. Include in your answer which type of the molecule is moving for each process, in which direction the molecules in question are moving (low to high or high to low concentrations).
Part 1: If a gated channel (not a pump) is specific for potassium ions and based on what you know about concentration gradients, when will the potassium ions move through the channel? a) Is gated channel transport using energy (ATP)? Part 2: Why does the sodium - potassium pump need to use energy (ATP)? a) Define active transport in your own words.
The process of “active transport" through a membrane may be described by which of the following? A. the movement of ions and small molecules away from regions where they are in high concentration. B. the use of energy from ATP to move ions and small molecules into regions where they are in lower concentration. C. the plasma membrane engulfs the substance and moves it through the membrane. D. the use of energy from ATP to move ions and small molecules against their concentration gradient.
1) You are studying a transport protein. It appears to bind temporarily to the molecule to be transported. During normal transport, no energy is expended. The addition of a particular molecule that closely resembles the normally transported molecule inhibits transport. An increase in the concentration of the normally transported molecule in the presence of a constant concentration of the inhibitor increases the rate of transport. What kind of transport is described? 2) What are peripheral membrane proteins?
Proteins are transported from the cytoplasm into the nucleus as well as mitochondria / chloroplasts. There is also a transport that goes via vesicles. Describe these three different transport systems and explain how the cell knows which protein should end up in which organelle.
Which is incorrect?a. Diffusion of a solute through a membrane is considerably quicker thandiffusion of the same solute through a water layer of equal thickness.b. A single ion, such as K1, can diffuse through more than one type ofchannel.c. Lipid-soluble solutes diffuse more readily through the phospholipidbilayer of a plasma membrane than do water-soluble ones.d. The rate of facilitated diffusion of a solute is limited by the number of transporters in the membrane at any given time.e. A common example of cotransport is that of an ion and an organic molecule.