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Describe the effects of cigarette smoke on the airway.

Cigarette smoke contains a number of harmful chemicals such as Tar, Carbon monoxide and Nicotine. Tar settles on the lining of the airway and alveoli, increasing the diffusion distance for the gases oxygen a...
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Answered by Kristen D. • Biology tutor
6596 Views

What are Enzymes and how do they work?

What is an Enzyme? Enzymes have an essential role in the reactions in the body from respiration to digestion. Enzymes are globular proteins with a specific tertiary shape. Enzymes are Biological Catalysts Su...
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Answered by Katie D. • Biology tutor
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Expanding a quadratic equation (x-3)(x-2)=0

Focus on the left hand side of the equation: (x-3)(x-2) These are two factors, basically that (x-3) is a number, and (x-2) is another number. (x-2)(x-3) is just showing that you're multiplying these numbers ...
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Answered by Daniel W. • Maths tutor
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Describe Milgram's obedience study

Milgram was interested in why so many people can carry out inhumane acts when instructed by someone in authority, in particular the Nazi soldiers in World War 2. He questioned whether people could be held ac...
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Answered by Dana R. • Psychology tutor
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When do I use Sin, Cos and Tan?

Just remember SOH,CAH,TOA. It sounds like Sock-A-Toe-Ah. Quite strange but extremely effective. SOH means Sin=Opposite/Hypotenuse Cos=Adjacent/Hypotenuse Tan=Opposite/Adjacent The three letters in each abbre...
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Answered by Darren C. • Maths tutor
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