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What variables affect the rate of diffusion?

There are five main features that effect the rate of diffusion: The rate of diffusion INCREASES if there is a short diffusion path because there is less chance of collision of particles. The rate of diffusio...
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Answered by Charlotte W. • Biology tutor
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Emphysema is a disease affecting the lungs. People with emphysema are often short of breath and find exercise difficult. Explain what happens to the lungs in this disease to cause the symptoms mentioned.

Emphysema affects the structure of the lungs called the alveoli. Each healthy alveolus has a large surface area in order for maximum diffusion of oxygen in the lungs. If someone is affected by emphysema, the...
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Answered by Elodie L. • Biology tutor
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Why does cholesterol need to be reduced and how do statins do this?

-High levels of cholesterol (especially LDL's, the 'bad' type) clog the arteries with a thick fatty substance -This causes narrowing of the coronary arteries (which carry blood to the heart) -The narrowing a...
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Answered by Isobel P. • Biology tutor
3177 Views

Identify 3 different antibiotics and describe how they work.

Antibiotics are important for treating bacterial infections that may be making us ill. There are many different antibiotics that work in different ways, and therefore they are suitable for treating different...
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Answered by Madeleine H. • Biology tutor
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What is the difference between mitosis and meiosis?

Mitosis is the production of two genetically identical diploid daughter cells in one division while meiosis is the formation of four genetically different haploid daughter cells in two divisions. Mitosis occ...
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Answered by Oskar D. • Biology tutor
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