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Describe the process of breathing out.

Firstly, the intercostal muscles contract. This causes the ribcage to move upwards and outwards. The diaphragm also contracts. This all has the combined effect of increasing the volume of the lungs. As a res...
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Answered by Julia Z. • Biology tutor
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Explain how blood sugar level is controlled in the body?

The control of different substances in the body keeping them at a stable equilibrium level is called homeostasis. One area of this is blood sugar level control, if blood sugar level is too high or too low th...
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Answered by Angus S. • Biology tutor
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What is the best technique for drawing diagrams in an exam?

First, list all the information you need to include as a reminder in some spare space. For example, if you had to draw a plant cell writing "cell membrane, cytoplasm, nucleus, mitochondria, ribosomes, v...
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Answered by Bethany M. • Biology tutor
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Some babies are born with a hole between the right and the left ventricles. These babies are unable to get enough oxygen to their tissues. Suggest why. (2)

A hole between the right and left ventricle means that blood would shunt from the left to the right ventricle as the pressure in the left ventricle is higher than in the right ventricle, leading to the mixin...
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Answered by Sparsh S. • Biology tutor
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What are two different ways cells of the body signal each other? Give an example of each.

Electrical signal, e.g. when you touch something hot, an electrical signal goes from your hand to your brain to tell you to pull your hand away. How do you know it's electrical? Because it's so fast! Chemica...
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Answered by Isobel H. • Biology tutor
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