IB Biology B2.1 Definitions
The movement of substances across membranes usually against concentration gradients, requiring energy from ATP
A molecule's property of being both hydrophobic and hydrophilic
The net passive movement of particles from areas of high concentration to areas of low concentration, requiring no energy
The passive movement of particles from areas of high concentration to areas of low concentration via specific channel proteins
Attracted to water (water-loving)
Repelled to water (water-fearing)
The movement of water from a region of low solute concentration to a region of high solute concentration, across a partially permeable cell membrane
A protein on the surface of the plasma membrane
The passive movement of particles from areas of high concentration to areas of low concentration across a semi-permeable membrane