12 Questions
What is the primary function of transport proteins in the cell?
To help transport molecules in and out of the cell
Which type of molecule can pass through the cell membrane easily?
Small nonpolar molecule
What is the characteristic of symporter proteins?
Move molecules in the same direction
What is the process of molecules moving from higher concentration areas to lower concentration areas?
Diffusion
What is the function of secondary active transporter proteins?
To move two molecules at the same time
Which type of molecule is unable to pass through the cell membrane?
Glucose
What is Fick's law used to model?
Transport processes
What is the flux of molecules flowing through a membrane given in terms of?
Permeability of the membrane and concentration difference
What is the direction of diffusive flux?
From high concentration to low concentration
What is P in the equation J = P (C1-C2)?
Permeability of the membrane
What is the condition for facilitated diffusion?
The system shows saturation kinetics
What is the relation between J and concentration gradient?
J is directly proportional to the concentration gradient
Test your understanding of membrane transport mechanisms, including facilitated diffusion and carrier-mediated diffusion, and how they affect the passage of small and large molecules, ions, and gases across semipermeable membranes. Learn about the role of proteins in this process.
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