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...
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...
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...
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...
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...
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...
1.2.11 Practical: Vitamin C Content Vitamin C is found in green vegetables, fruits, and potatoes It is essential for a healthy diet The chemical name for vitamin C is ascorbic acid Ascorbic acid is...
Lipids & CVD A risk factor is any factor that increases the chance of developing a particular condition or disease An increase in a risk factor does not guarantee the development of disease, bu...
知道AMC，大多都是对数学感兴趣，想要报名考试的学生。有的学生不知道去哪里找真题，也不知道怎么报名，那么今天小编就带着大家了解一下今年的AMC12，由于考试时间临近，所以本文重点讲讲今年的考试形式，不能忽...
Lipids Lipids Lipids are macromolecules that contain carbon, hydrogen and oxygen atoms. Unlike carbohydrates, lipids contain a lower proportion of oxygen Lipids are non-polar and hydrophobic (insol...
作为ISEF初中版的博通大师赛在经过组委会对30位入围学生的评选后，刚刚公布了最高奖项Samueli基金会奖和其他等等重量级荣誉的获奖名单！ 在恭喜这些学生的同时也让我们来看看这些优秀的学生是凭借什么样的科研项...
知道AMC10美国数学学术活动的，大多都是对数学感兴趣，想要报名考试的学生。有的学生不知道去哪里找真题，也不知道怎么报名，那么今天小编就带着大家了解一下今年的AMC10，由于考试时间临近，所以本文重点讲讲今...
