60 Questions
According to Fick's law, the rate of diffusion depends on which of the following factors?
The solubility of the substance in the membrane
Which of the following is true about cells specialized for transporting large amounts of solute?
They have more transporters
What is the rate of flow of charges across a membrane known as?
Current
According to Ohm's law, what happens to the current when the resistance increases?
The current decreases
In which situation does Ohm's law predict a lower resistance?
Many channels and lower voltage
What is responsible for establishing voltage in a charged particle?
The electric field of the particle
Which parameter in Poiseuille's law determines the rate of flow of a fluid through a tube?
Radius of the tube
According to Poiseuille's law, what happens to the flow if the length of the tube increases?
The flow decreases
Which of the following is true about viscous fluids?
Viscous fluids are more syrupy
Which parameter in Poiseuille's law is directly related to the force that a substance exerts on the walls of its container?
Hydrostatic pressure
Which of the following is affected by the difference in hydrostatic pressure between two points in a tube or vessel?
Rate of flow
In the respiratory tract and the cardiovascular system, flow of gas or blood to tissues is clinically relevant in terms of which unit?
mL/min
According to Fick's law, which of the following factors affects the flow/flux of substances through capillaries and cell membranes?
All of the above
What is the simplified equation that describes flow in Poiseuille's law?
Flow = \DeltaP/R
Which of the following is NOT a caveat of Poiseuille's law?
Radius of the tube is the most important determinant of resistance
What does Fick's law quantify?
Flow
What are the factors that affect the flow/flux according to Fick's law?
All of the above
How does flow change when the concentration gradient decreases according to Fick's law?
Flow decreases
Which equation represents Poiseuille's law for fluid flow?
$F = \frac{8 \pi \eta L},{r^2}$
Which equation represents Fick's law for diffusion?
$J = -D \frac{dc},{dx}$
Which equation represents Ohm's law for bioelectricity?
$I = \frac{V},{R}$
Which statement accurately describes flow down gradients?
Flow is measured by the size of the energy gradient between two points.
What factors resist the flow down gradients in a system?
Energy gradient and resistance
What is the driving force for the flow of a substance down a gradient?
Energy gradient
Which of the following clinical findings is most likely due to vascular changes in Mary's case of diabetes mellitus?
15 seconds capillary refill time on the right great toe
Which of the following clinical findings is less likely to be due to vascular changes in Mary's case of diabetes mellitus?
Inability to distinguish between sharp and dull stimuli over the right foot
What is the most likely cause of Robert's foot swelling based on his medical history?
NYHA stage II heart failure
What is the most likely cause of Robert's shortness of breath based on his medical history?
NYHA stage II heart failure
How does Robert's foot swelling relate to the physicochemical laws discussed in the pre-learning and during the lecture?
It is a result of fluid backup in the venous system
How does Robert's shortness of breath relate to the physicochemical laws discussed in the pre-learning and during the lecture?
It is a result of impaired cardiac output
According to Fick's law, which of the following factors affects the flow/flux of substances through capillaries and cell membranes?
The permeability of the membrane to the charged particle
Which equation represents Ohm's law for bioelectricity?
$V = I \times R$
What is the driving force for the flow of a substance down a gradient?
Concentration gradient
Which parameter in Poiseuille's law determines the rate of flow of a fluid through a tube?
Radius of the tube
Which of the following clinical findings is most likely due to vascular changes in Mary's case of diabetes mellitus?
Numbness and coldness in her feet
According to Fick's law, the rate of diffusion depends on which of the following factors?
Surface area and thickness of the membrane
According to Poiseuille's law, which of the following is the most important determinant of resistance in a tube?
Tube radius
Which of the following is a caveat of Poiseuille's law?
Resistance changes with turbulent flow
Which equation represents Fick's law for diffusion?
$F = k \cdot A(C_A - C_B) / t$
According to Fick's law, which of the following factors affects the flow/flux of substances through capillaries and cell membranes?
All of the above
What is the driving force for the flow of a substance down a gradient?
Concentration difference
Which of the following is NOT a factor that affects the flow/flux according to Fick's law?
Temperature
Which of the following clinical findings is most likely due to vascular changes in Mary's case of diabetes mellitus?
15 seconds capillary refill time on the right great toe
Which aspect(s) of Robert's medical history best explain his foot swelling?
NYHA stage II heart failure
What is the driving force for the flow of a substance down a gradient?
Concentration difference
How does Robert's shortness of breath relate to the physicochemical laws discussed in the pre-learning and during the lecture?
It is a result of impaired cardiac output
Which parameter in Poiseuille's law determines the rate of flow of a fluid through a tube?
Radius of the tube
According to Ohm's law, what happens to the current when the resistance increases?
Current decreases
Which of the following equations represents Ohm's law?
$I = rac{V}{R}$
What is the driving force for the flow of a substance down a gradient?
Energy gradient
Which equation represents Fick's law for diffusion?
$J = -D rac{dC}{dx}$
What factors resist the flow down gradients in a system?
Conductance and resistance
Which parameter in Poiseuille's law determines the rate of flow of a fluid through a tube?
Radius of the tube
How does flow change when the concentration gradient decreases according to Fick's law?
Flow decreases
According to Poiseuille's law, which of the following factors affects the rate of flow of a fluid through a tube?
Radius of the tube
What happens to the rate of flow if the length of the tube increases according to Poiseuille's law?
The rate of flow decreases
According to Fick's law, which of the following factors affects the flow/flux of substances through capillaries and cell membranes?
Difference in hydrostatic pressure
What is the driving force for the flow of a substance down a gradient?
Difference in concentration or pressure
What is the simplified equation that describes flow in Poiseuille's law?
F = (P1 - P2) * 𝝅 * r^4 * l * 𝝁
Which of the following is true about viscous fluids?
Viscous fluids have high viscosity
Test your knowledge of Poiseuille's law and its limitations with this quiz. Learn about the conditions under which the law is accurate and the factors that can affect resistance in fluid flow. Discover the impact of tube shape, flexibility, and turbulent flow on the accuracy of Poiseuille's law.
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