The salt marsh plant pickleweed or Salicornia bigelovii is, not surprisingly, very salt tolerant. It can also regulate its response to the changing salt concentrations found in the marsh... The plant has ways to adapt to these different conditions. For example, under high salt conditions, the plant might want its membrane potential more similar to what it is in low salt conditions. Which things could be varied by the plant cell?

The salt marsh plant pickleweed or Salicornia bigelovii is, not surprisingly, very salt tolerant. It can also regulate its response to the changing salt concentrations found in the marsh... The plant has ways to adapt to these different conditions. For example, under high salt conditions, the plant might want its membrane potential more similar to what it is in low salt conditions. Which things could be varied by the plant cell?

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 2TAHL: Assume that a membrane permeable to Na+ but not to Cl- separates two solutions. The concentration of...

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In the figure below are several panels that illustrate the relative concentration of a particular solute on either side of a cell's plasma membrane. The top panel represents the INITIAL (or starting) scenario, and the lower panels represent different possible outcomes after time has passed. QUESTION: Which of the panels below represents a situation in which the concentration gradient of this solute has been minimized (reduced)? A B C D
Liver cells are in contact with the blood and exchange a variety of substances with the blood plasma (the noncellular part of blood). The concentration of water is equal in the cytoplasm of liver cells and in the blood plasma. Explain this observation in terms of membrane permeability and transport mechanisms. Animal cells typically maintain a higher concentration of Na+ outside the cell and a higher concentration of K+ inside the cell via the Na+-K+ pump. The drug ouabain inhibits the activity of the Na+-K+ pump. A nerve cell is incubated in ouabain. Predict what will happen to the concentrations of Na+ and K+ inside and outside the nerve cell as a result.
Which of the following is false concerning osmosis? Question options: The net movement of water molecules from a region of lower water potential to a region of higher water potential across a semipermeable membrane. Individual molecules of water are in constant flux into and out of cells. The movement of water molecules from a region of higher water potential to a region of lower water potential across a semipermeable membrane. The effects of osmosis vary between cell types.
This is a homework question Define osmosis and describe how the first experiment, "Osmosis in Potatoes," demonstrates this molecular transport mechanism.
I don’t understand this
The beaker in the diagram has a selectively permeable membrane separating two solutions. Assume that the salt molecules can pass freely through the membrane. Will the water level on either side of the membrane change? Explain your answer.
In osmosis, water moves from an area of low solute concentration (high water concentration) to an area of high solute concentration (low water concentration). So, it's the movement of water that helps balance the concentration of solutes on both sides of a semipermeable membrane. My question is when water move from high concentration to low concentration ,it's the movement of water making it balance. So why does it says in definition low solutue concentration going to that high solutue concentration, isn't it make the solute like ion and other molecules going to the higher side and not making it balance. High concentration of water to low concentration water movement is make sense to me But low solute cocentration to high solute concentration part does not make sense at all Please explain how does low concerned ntration solute going to high concentration of solute making balance?
What is the free energy change for the transport of calcium ions (Ca++) across a membrane from a region (left) where the concentration is 50 micromolar to a region (right) where the concentration is 50 micromolar? A membrane potential of 60 mV exists across the membrane where the right side is more negative than the left side. The temperature is 25 C.
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There are several membrane-bound organelles in cells (e.g. nuclei, mitochondria, endoplasmic reticulum) that can also have ion channels in their membranes. Sketch an electrical circuit model of a cell that expresses sodium, calcium, and chloride ion channels in its cellular membrane and calcium and chloride ion channels in its nuclear envelope membrane.
The uneven distribution of ions across the plasma membrane is regulated, in part, by transport proteins. The result is a net negative charge on the inside of the plasma membrane and a net positive charge on the outside of the plasma membrane. How doyou explain the net negative charge inside the plasma membrane when the predominant intracellular ion is K+?
A8.