CIE A Level Biology复习笔记4.2.11 Osmosis in Animals
Osmosis: Animal Cells Osmosis is the net movement of water molecules from a region of higher water potential (dilute solution) to a region of lower water potential (concentrated solution), through ...
CIE A Level Biology复习笔记4.2.10 Osmosis in Plant Cells
Osmosis: Plant Cells Osmosis is the net movement of water molecules from a region of higher water potential (dilute solution) to a region of lower water potential (concentrated solution), through a...
CIE A Level Biology复习笔记4.2.9 Estimating Water Potential in Plants
Estimating Water Potential in Plant Tissue It is possible to investigate the effects of immersing plant tissue in solutions of different water potentials and then use the results to estimate the wa...
CIE A Level Biology复习笔记4.2.8 Investigating Surface Area
Investigating SA with Agar The effect of changing surface area to volume ratio on diffusion can be investigated by timing the diffusion of ions through cubes of agar of different sizes Method Colou...
CIE A Level Biology复习笔记4.2.7 Surface Area to Volume Ratios
Principles of SA:V Surface area and volume are both very important factors in the exchange of materials in organisms The surface area refers to the total area of the organism that is exposed to the...
CIE A Level Biology复习笔记4.2.6 Investigating Diffusion
Investigating Diffusion Investigating diffusion using Visking tubing Visking tubing (sometimes referred to as dialysis tubing) is a non-living partially permeable membrane made from cellulose Pores...
CIE A Level Biology复习笔记4.2.5 Investigating Transport Processes in Plants
Investigating Diffusion & Osmosis: Plant Tissue Investigating diffusion The permeability of cell membranes can be affected by environmental factors such as chemicals or temperature This can be ...
CIE A Level Biology复习笔记4.2.4 Endocytosis & Exocytosis
Endocytosis & Exocytosis The processes of diffusion, osmosis and active transport are responsible for the transport of individual molecules or ions across cell membranes However, the bulk trans...
CIE A Level Biology复习笔记4.2.3 Active Transport
The Process of Active Transport Active transport is the movement of molecules and ions through a cell membrane from a region of lower concentration to a region of higher concentration using energy ...
