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Outline how a heartbeat is initiated and controlled

The heart is myogenic, meaning it initiates its own muscle contraction. At the Sinoatrial Node (SAN), found in the right atrium, an electrical impulse is generated that spreads across the atria, causing them...
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Answered by Anna P. • Biology tutor
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What is the coefficient of the x^3 term in the binomial expansion of (2x+(1/3x^2))^9

512
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Answered by Andrew W. • Maths tutor
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What is visual analysis?

Visual analysis is when we look at an artwork and try to understand what is going on inside the frame. This could be as simple as identifying the story (or the narrative), or it could be analysing the colour...
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How can I revise for English Literature?

The common thought is that because English is unlike Maths and Science, it is difficult to find a good way to revise for it. Since the new curriculum, English Literature requires you to memorise the quotes a...
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How do 'reflexive verbs' work?

In Italian, if there is a reflexive verb, the action carried out by the subject of the sentence is performed on the subject itself. For example , if we say " Mi guardo allo specchio ", which means ...
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Answered by Cecilia C. • Italian tutor
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