Top answers

What is active transport?

The movement of molecules from an area of high concentration to low concentration across a membrane using energy.
JW
Answered by Jessica W. • Biology tutor
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"Describe the process of Aerobic Respiration"

Aerobic respiration is a process that releases energy from a respiratory substrate (e.g. glucose) by fully oxidising it. Energy is released in the form of ATP; Carbon dioxide and Water are released as by pro...
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Answered by Firat G. • Biology tutor
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What are the features of alveolar epithelium which allow efficient gas exchange?

The alveolar epithelium is very thin, just one cell layer thick. This means the diffustion distance is small, therefore diffusion of gases occurs rapidly. Remember that diffusion is the net movement of parti...
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Answered by Shoam B. • Biology tutor
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What are the key elements of an internal investigation?

The key elements which will help you achieve top marks in your IA are personal engagement, primary data, data manipulation and findings from other investigations similar.
AL
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What is meant by 'metabolic rate'?

Metabolic rate is the speed at which chemical reactions take place in our bodies
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Answered by Georgina H. • Biology tutor
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