5.2 Transport Processes Flashcards
1
Q
What is Bulk Flow?
A
Movement of fluids from high pressure to low pressure.
2
Q
What is Diffusion?
A
Movement of molecules from high concentration to low concentration until equilibrium.
3
Q
What is Protein-Mediated Transport?
A
Uses proteins in the cell membrane to transport molecules across.
4
Q
What is Vesicular Transport?
A
Uses vesicles to transport large molecules or particles.
5
Q
What does Selectively Permeable Mean?
A
Cell membranes allow some substances to pass through but not others.
6
Q
What is Passive Transport?
A
Movement of molecules according to concentration gradients without energy input.
7
Q
What is Active Transport?
A
Movement of molecules against concentration gradient requiring energy
8
Q
what are factors affecting permeability?
A
- Size; smaller molecules tend to pass more easily
- Lipid solubility: lipid molecules tend to pass more easily
