CS專業力壓藤校，實力被嚴重低估的公立常春藤——UIUC伊利諾伊大學香檳分校
社會捐贈作為美國大學重要的資金來源之一，是學校提供高質量教學、研究和服務的基本保證！ 近日，UIUC官宣他們已提前達成了“計劃在5年時間內實現22.5億美元慈善籌款”計劃，僅僅用了四年，伊大就累計籌得款項27億...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.8 Osmosis
Osmosis All cells are surrounded by a cell surface membrane which is?partially permeable Water can move in and out of cells across the cell surface membrane by a process called?osmosis Osmosis is t...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.7 Active Transport
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 Active transport?requires en...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.6 Diffusion & Facilitated Diffusion
Diffusion & Facilitated Diffusion Diffusion is a type of?transport?that can occur?across a cell membrane Note that diffusion can also happen within a cellular compartment; the presence of a mem...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.5 Practical: Investigating Membrane Structure & Permeability
Practical: Investigating Membrane Structure & Permeability The?permeability?of?cell membranes?is affected by several?factors?such as Temperature pH The effect of such factors on membrane struct...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.4 Cell Membranes
Cell Membranes Membranes?are vital structures found in all cells The?cell surface membrane?creates an enclosed space separating the internal cell environment from the external environment, and?intr...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.3 The Mammalian Lung
The Mammalian Lung: Structure & Function The?lungs?of air-breathing animals provide an ideal exchange surface for the diffusion of gases The lungs are located in the?thorax, or?chest cavity Som...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.2 Fick's Law of Diffusion
Fick's Law of Diffusion Fick's Law relates the rate of diffusion to the concentration gradient, the diffusion distance and the surface area This relationship can be represented by the following equ...
Edexcel A (SNAB) A Level Biology:復習筆記2.1.1 Properties of Gas Exchange Surfaces
Properties of Gas Exchange Surfaces All organisms need to?exchange gases with their environment,?e.g. Aerobic?respiration?requires oxygen and produces carbon dioxide as a waste product Photosynthes...
