Understandings, Applications and Skills:
1.4.U1: Particles move across membranes by simple diffusion, facilitated diffusion, osmosis and active transport. > Simple Diffusion
> Osmosis
> Facilitated Diffusion
> Active Transport
1.4.U2: The fluidity of membranes allows materials to be taken into cells by endocytosis or released by exocytosis.
1.4.U3: Vesicles move materials within cells.
1.4.A1: Structure and function of sodium–potassium pumps for active transport and potassium channels for facilitated diffusion in axons.
1.4.A2: Tissues or organs to be used in medical procedures must be bathed in a solution with the same osmolarity as the cytoplasm to prevent osmosis.
1.4.S1: Estimation of osmolarity in tissues by bathing samples in hypotonic and hypertonic solutions. (Practical 2) [Osmosis experiments are a useful opportunity to stress the need for accurate mass and volume measurements in scientific experiments.]
1.4.NOS: Experimental design- accurate quantitative measurements in osmosis experiments are essential.
1.4.U1: Particles move across membranes by simple diffusion, facilitated diffusion, osmosis and active transport. > Simple Diffusion
> Osmosis
> Facilitated Diffusion
> Active Transport
1.4.U2: The fluidity of membranes allows materials to be taken into cells by endocytosis or released by exocytosis.
1.4.U3: Vesicles move materials within cells.
1.4.A1: Structure and function of sodium–potassium pumps for active transport and potassium channels for facilitated diffusion in axons.
1.4.A2: Tissues or organs to be used in medical procedures must be bathed in a solution with the same osmolarity as the cytoplasm to prevent osmosis.
1.4.S1: Estimation of osmolarity in tissues by bathing samples in hypotonic and hypertonic solutions. (Practical 2) [Osmosis experiments are a useful opportunity to stress the need for accurate mass and volume measurements in scientific experiments.]
1.4.NOS: Experimental design- accurate quantitative measurements in osmosis experiments are essential.