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What’s the difference between arteries, veins and capillaries?

Blood vessels allow blood to be circulated around the whole body for delivery of oxygen/nutrients and removal of waste products. Structure relates to function.• Arteries - take blood away from the heart. Art...
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Answered by Inshiya K. • Biology tutor
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Factorise fully x^3 - 10x^2 + 16x

The first thing we notice is that there is a common factor of x. Thus we can factor it out and get:x(x^2 - 10x + 16) This becomes much easier to deal with. We now focus on the equation in the brackets.We nee...
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Answered by Karina T. • Maths tutor
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Describe which neurones are involved in coordinating a reflex action.

Reflexes are involuntary and instantaneous actions that occur in response to a stimulus, for example our pupils contracting in response to a bright light. The receptor detects this stimulus and sends an elec...
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Answered by James D. • Biology tutor
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How do I write an introduction to an essay?

The introduction to an essay is essentially the section where you can highlight the key points of your argument; it is useful both to the author and the reader as it helps to give the rest of the essay a sen...
GC
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Sodium and sodium chloride can both conduct of electricity under cetain conditions. Describe and explain the method of conduction for each species. (3)

Sodium metal can conduct electricity when solid or molten through the movement of delocalised electrons, which can carry charge. Sodium chloride is only conductive when molten or dissolved in solution, as th...
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Answered by Noah K. • Chemistry tutor
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