Alanine is an example of an uncharged solute. In the image below, indicate whether the most favorable movement of alanine would be inwards (into the cell) or outwards (out of the cell). Briefly explain your answer. Alanine Uncharged solutes Alanine 0.1 mm Extracellular space Alanine 2 mM cell

Alanine is an example of an uncharged solute. In the image below, indicate whether the most favorable movement of alanine would be inwards (into the cell) or outwards (out of the cell). Briefly explain your answer. Alanine Uncharged solutes Alanine 0.1 mm Extracellular space Alanine 2 mM 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 5RE: Using the answer code on the right, indicate which membrane component is responsible for the...

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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.

Question

Alanine is an example of an uncharged solute. In the image below,
indicate whether the most favorable movement of alanine would be
inwards (into the cell) or outwards (out of the cell).
Briefly
explain your answer.
Alanine= Uncharged solutes
Alanine
0.1 mM
Extracellular space
Alanine
2 mM
cell

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Assume that a membrane permeable to Na+ but not to Cl- separates two solutions. The concentration of sodium chloride on side 1 is higher than on side 2. Which of the following ionic movements would occur? a. Na+ would move until its concentration gradient is dissipated (until the concentration of Na+ on side 2 is the same as the concentration of Na+ on side 1). b. Cl- would move down its concentration gradient from side 1 to side 2. c. A membrane potential, negative on side 1, would develop. d. A membrane potential, positive on side 1, would develop. e. None of the preceding is correct.
What forces drive solutes from one side of the membrane to the other?• What solute properties dictate its permeability?– Why can some solutes passively diffuse through the plasma membrane, and some cannot?
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Which of the following best describes a hypotonic solution? a-There is a higher concentration of solute outside the cell than inside the cell b-There is a lower concentration of solute outside the cell than inside the cell c-The solute concentration both inside and outside the cell is equal d-Through osmosis, water will enter the cell causing it to swell
The movement of water through a semipermeable membrane from a region of lower solute concentration to a region of higher solute concnetration is called _________ osmosis diffusion solubility gradient
In osmosis, due to solute concentration differences, the solute will move from a higher concentration to a lower concentration. True or False
Which of the following is always at the same concentration inside and outside the cell? a. potassium ions b. water c. hydrogen ions d. glucose e. sodium ions
When a cell is placed in a hypotonic solution,a. solute exits the cell to equalize the concentration on both sides ofthe membrane.b. water exits the cell toward the area of lower solute concentration.c. water enters the cell toward the area of higher soluteconcentration.d. there is no net movement of water or solute.
DO NOT COPY THE ANSWER FROM THE SAME QUESTION. Sassa, a biology professor, wanted to demonstrate to her students the applicability of a dialyzing membrane (DM) as a model for the cell membrane by enclosing an aqueous solution in a DM bag and immersing in a beaker containing a different solution. Substances available which are permeable to the DM include 0.02 M NaCl, 0.03 M glucose, and 0.01 M glucose. The only substance available which is completely impermeable to the DM is the 0.01 M lactose. Using the substances given and materials such as a beaker, stirring rod, and string, draw ONLY ONE set-up that can be demonstrated by Ms. Sassa that will satisfy ALL of the following conditions:a. No solute will exhibit a net diffusion out of the cell.b. Glucose will exhibit a net diffusion into the cell.c. NaCl will exhibit a zero net d. No net movement of lactose from the inside to outside of the cell. Make sure to label properly the substance inside the beaker and inside the DM bag.
In osmosis, water flows from hypertonic/hypotonic/isotonic solutions to hypertonic/hypotonic/isotonic solutions, until both solutions are hypertonic/hypotonic/isotonic.