Question
In: Physics
1. Why is the steady state concentration gradient linear in equimolecular counter diffusion? 2. Explain why...
1. Why is the steady state concentration gradient linear in equimolecular counter diffusion?
2. Explain why the dissolution of a crystalline particle in a solution can be speeded up by (a) stirring the solution and (b) by crushing the particle, from a mass transfer perspective.
Solutions
genius_generous answered 2 years agoRelated Solutions
nvestigation of Factors Affecting the Rate of Diffusion In addition to the concentration gradient (i.e. the...
nvestigation of Factors Affecting the Rate of
Diffusion
In addition to the concentration gradient (i.e. the difference
in the concentration of particles between two environments) there
are many other factors known to affect the rate of diffusion
including;
temperature
the size of the diffusing particles
the viscosity of the medium through which the particles move
The purpose of this exercise is for you to work in groups to
design experiments to test two of the factors listed above. You
will...
By using an appropriate example and diagram, explain the steady state diffusion of component A through...
By using an appropriate example and diagram, explain the steady
state diffusion of component A through non-diffusing component B
for molecular diffusion of gases.
1. True or false: Urea is reabsorbed passively by diffusion along its concentration gradient as water...
1. True or false: Urea is reabsorbed passively by diffusion
along its concentration gradient as water is reabsorbed.
Select one:
True
False
2.
Anti-diuretic hormone (=vasopressin) acts on collecting duct
cells with a vasopressin receptor by the following mechanism:
Select one:
a. activation of adrenergic receptors
b. increase in Na+/K+ pumps in the basal membrane
c. increase in Na+/K+ pumps in the apical membrane
d. exocytosis of vesicles that contain aquaporins
e. decrease in cell membrane cholesterol
3.
A decrease...
The steady-state diffusion flux through a metal plate is 5.4 x 10-10 kg/m2 s at a temperature of 827 °C (1100 K) and when the concentration gradient is -350 kg/m4
The steady-state diffusion flux through a metal plate is 5.4 x 10-10 kg/m2 s at a temperature of 827 °C (1100 K) and when the concentration gradient is -350 kg/m4 . Calculate the diffusion flux at 1027 °C (1300 K) for the same concentration gradient and assuming an activation energy for diffusion of 150,000 J/mol.
1) Describe passive transport. 2) Define concentration gradient, electrical gradient, and electrochemical gradient. 3) What factors...
1) Describe passive transport.
2) Define concentration gradient, electrical gradient, and
electrochemical gradient. 3) What factors play a role in the rate
of diffusion?
4) Explain the difference between simple diffusion and facilitated
diffusion.
5) Which type of molecules move via facilitated diffusion?
6) Why is active transport necessary?
7) What role does the Na-K pump play in active transport?
8) How is primary active transport different from secondary active
transport?
9) What is the mechanism for glucose transport across...
A) Explain why the steady state growth rate is independent of the savings rate in the...
A) Explain why the steady state growth rate is independent of
the savings rate in the Solow growth model?
B) Suppose two economies A and B exhibit the same exogenous
growth rate of the labour force. There is no technical progress and
the savings propensities are the same in both economies. The
initial capital stock in country A is much larger than that of
country B. Compare the transitional dynamics and the steady state
growth paths of the two economies.
Explain the role of the vasa recta in maintaining the medullary interstitial concentration gradient
Explain the role of the vasa recta in maintaining the medullary
interstitial concentration gradient
List three out of the seven processes that affect the steady-state concentration of a protein and...
List three out of the seven processes that affect the
steady-state concentration of a protein and an example of each
process (6pts)
Process:
Example
What is the relationship between dose, clearance, bioavailability and steady state plasma concentration?
What is the relationship
between dose, clearance, bioavailability and steady state plasma
concentration?
Explain in detail how the medullary osmotic gradient is generated and maintained and why the gradient...
Explain in detail how the medullary osmotic gradient is
generated and maintained and why the gradient is important for
regulating water balance and urine volume
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