You add 1 tsp. of sugar to a warm water solution and wait for the sugar molecules to diffuse acrossa screen gradient. You then add 1 tsp. of sugar to a cold-water solution. What will happen to therate of diffusion of the cold water solution, when compared to the warm water solution rate?O It will decrease (slow downO It will stay the sameO It will increase (speed up)

Movement of substances occurs by active or passive transport mechanisms.

Answered: You add 1 tsp. of sugar to a warm water…

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 6RE

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Which of the following statements is correct about passive facilitated diffusion? (select all that apply) V It is a process in which molecules move from a region of lower concentration to one of higher concentration (or up a concentration gradient). O It requires a transport protein. O It requires an expenditure of energy by the cell. O It is a process in which molecules move from a region of higher concentration to a region of lower concentration (or down a concentration gradient). O It involves movement of molecules up a concentration gradient and requires a transport protein.
Salt is being used to preserve salmon. You need to determine the time required for the salt concentration to reach a known value at the center of the salmon. The concentration of salt at the surface (CAS) is known, and so is the initial concentration (CAO) in the salmon muscle. You also know the mass diffusivity, Ds-s, of salt in salmon muscle. What type of system is this? O Steady State Diffusionn, no reaction O Unsteady State Diffusion O Steady State Diffusion, with reaction O Pseudosteady State O A through stagnate B
Which of the following does NOT affect the rate of diffusion? concentration of the solute O temperature O size of the particles O None of these affect the rate of diffusion O AlLof these affect the rate of diffusion Previous
Why is no energy required during diffusion? Particles are moving DOWN the concentration gradient Particles are moving UP the concentration gradient o search
Facilitated diffusion is a metabolically inexpensive process. O True O False
The principal force driving movement in diffusion is______. a. temperature b. particle size c. concentration gradient d. membrane surface area
In the diffusion of dye in water experiment, what variable did we test for that affected rate of diffusion? How did it affect rate of diffusion? a viscosity; higher viscosity results in slower rate of diffusion b temperature; higher temperature results in slower rate of diffusion c viscosity; higher viscosity results in faster rate of diffusion d temperature; higher temperature results in faster rate of diffusion
A Lab Data Did you correctly calculate the diffusion rate? Time (min) 10 20 30 Time (min) 0-10 0-20 0-30 Diffusion Spot Diameter 1 Crystal (mm) 15 15 18 Rate of Diffusion for 1 Crystal (mm/hr) 90 45 36 Diffusion Spot Diameter 3 Crystals (mm) 0-15 0-15 0-18 Rate of Diffusion for 3 Crystals (mm/hr) 270 135 108 How to Measure Diffusion Spot Diameter 6 Crystals (mm) 0-15 0-15 0-18 Rate of Diffusion for 6 Crystals (mm/hr) 540 270 216 Rate [mm/h] = (diameter [mm] / time [min]) x 60 [min - X V LABELS
Why does osmosis seem backwards from other forms of diffusion? O Science has still not been able to explain this strange behavior of water. O Hydrogen bonding between water molecules prevents them from diffusing the same way that other substances do. O Water is so important to life that it has an exemption from the normal rules. O Osmosis only seems backwards, but it's really not. It's actually just the diffusion of water molecules down their concentration gradient, which is inverse to the solute's concentration gradient. O Because osmosis is actually a completely different process than diffusion, and involves active transport.
Osmosis Practice Activity Osmosis is the diffusion of water from an area of high concentration to an area of low concentration. Only water moves in osmosis! The diagrams below show the concentration of water and salt inside the cell and the concentration of water and salt surrounding the cell. Complete the sentences below by comparing the concentration of the water inside the cell and the concentration outside the cell. 1. a. Water will flow the cell, out of the cell, in both directions). (into 5% NaCl 95% H20 95% NaCI 5% H20 b. The cell will (shrink, burst, stay the same). a. Water will flow (into the cell. 2. 5% NaCl out of the cell, in both directions). 5% NaCl 95% H20 95% H20 b. The cell will (shrink, burst, stay the same).
Shown below are cells (colored) that were recently placed into a beaker containing a clear solution For each scenario, indicate whether movement of the molecule into the cell will occur using facilitated diffusion or active transport. А. B. 125mM 20mM fructose glucose 85MM 35mM fructose glucose OA= facilitated diffusion; B= facilitated diffusion OA= active transport; B= active transport O A= active transport; B= facilitated diffusion A= facilitated diffusion; B= active transport
You have genetically modified a cell to have a thicker membrane than normal (25nm). To keepyour cells alive, you need to understand how diffusion of nutrients works. What is the flux ofglucose through the cell membrane given that: -The concentration of glucose in the media is 10mM -The concentration of glucose inside the cell is 2mM -The diffusivity of glucose is 6x10-10m2/s

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