B3 Movemen

Apuntes

B3 Movement into and out of cells Revision IGCSE BIOLOGY 2023-2025 MMS RC HIGHLANDS EL ENCINAR 3.1 Diffusion • 1 Describe diffusion as the net movement of particles from a region of their higher concentration to a region of their lower concentration (i.e., down a concentration gradient), as a result of their random movement • 2 State that the energy for diffusion comes from the kinetic energy of random movement of molecules and ions • 3 State that some substances move into and out of cells by diffusion through the cell membrane • 4 Describe the importance of diffusion of gases and solutes in living organisms • 5 Investigate the factors that influence diffusion, limited to: surface area, temperature, concentration gradient and distance Core 3.2 Osmosis • 1 Describe the role of water as a solvent in organisms with reference to digestion, excretion and transport • 2 State that water diffuses through partially permeable membranes by osmosis • 3 State that water moves into and out of cells by osmosis through the cell membrane • 4 Investigate osmosis using materials such as dialysis tubing • 5 Investigate and describe the effects on plant tissues of immersing them in solutions of differe...