Emma's back with everything you need to know about substance exchange in organisms for your A Level Biology exam. She goes through the important concept of surface area to volume ratio, as well as gas exchange in single-celled organisms. Perfect for AQA, Edexcel and OCR exam boards. Ideal for preparing you for your A Level Biology exam.
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Substance Exchange: Surface Area to Volume Ratio 

Let other students help you revise for your A Level Biology exams. In this series, students break down complicated revision subjects to its core components helping you rock your exams. Find your FREE online course here: http://bit.ly/2TaDFD8

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This week, Emma's got the lowdown on facilitated diffusion and polarized membranes for your AP Bio exam. She looks at how molecules diffuse through carrier proteins or channel proteins in membranes. Perfect for AQA, Edexcel and OCR exam boards. Ideal for preparing you for your A Level Biology exam.
Click here for the full course, or visit this link: http://bit.ly/2TaDFD8

Cellular Transport: Facilitated Diffusion & Polarized Membranes ➕ - A Level Biology Learning & Revision

Join Emma this week as she looks at osmosis for your High School Bio exam. She goes through the diffusion of water across a partially permeable membrane and the effect of this process on the shape of plant cells. Perfect for AQA, Edexcel and OCR exam boards. Ideal for preparing you for your A Level Biology exam.
Click here for the full course, or visit this link: http://bit.ly/2TaDFD8

Tonicity & Osmoregulation: Osmosis & Plant Cells 

In this episode, Emma looks at diffusion and active transport for your High School Bio exam. She goes through the difference between diffusion and active transport and gives examples of each. Perfect for AQA, Edexcel and OCR exam boards. Ideal for preparing you for your A Level Biology exam.
Click here for the full course, or visit this link: http://bit.ly/2TaDFD8

Cellular Transport: Diffusion & Active Transport 

In this episode, Emma looks at gas exchange in the human body for your A level Biology exam. She goes through the structure of the lungs and how each part is adapted to its function, including the alveoli, the bronchi and bronchioles. Perfect for AQA, Edexcel and OCR exam boards. Ideal for preparing you for your A Level Biology exam.
Click here for the full course, or visit this link: http://bit.ly/2TaDFD8

Gas Exchange: Lungs & Human Gas Exchange 

This week, Emma looks at the control of water loss for your A level Biology exam. She goes into xerophytic plants and their adaptations to desert habitats in order to control the loss of water. Perfect for AQA, Edexcel and OCR exam boards. Ideal for preparing you for your A Level Biology exam.
Click here for the full course, or visit this link: http://bit.ly/2TaDFD8

Substance Exchange: Surface Area to Volume Ratio

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