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Explain how nerve transmission occurs at the synapse.

As an action potential arrives at the presynaptic knob, the membrane is depolarised. This causes calcium channels in the membrane to open and calcium ions to flood in. This influx of calcium causes vesicles ...
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Answered by Abigail H. • Biology tutor
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How do I differentiate a quadratic to the power n?

To do this we will use the chain rule, whereby dy/dx = dy/du * du/dx. So if y = (ax^2+bx+c)^n then we will say that u = ax^2+bx+c. Therefore y =u^n. So to find dy/dx we differentiate u with respect to x, whi...
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Answered by Alex A. • Maths tutor
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Outline the principal features of a geostationary orbit and use them to explain one use of satellites in this type of orbit.

Geostationary orbits: -have a time period of 24 hours -have an angular speed equal to that of the Earth - maintain above a fixed position on the Earth's surface at all times. Therefore, they are very good fo...
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Answered by Alex A. • Physics tutor
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How are force and work related?

The work done on a body is defined as the force applied to that body multiplied by the distance it is applied over.
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Answered by Alex A. • Physics tutor
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What is the process of saltatory conduction and why is it important in the human nerve system?

Many (Not all) neurons are myelinated by schwann cells. The myelination covers the neuron with a fatty layer with small gaps between each schwann cells. These small gaps are called nodes of ranvier. When an ...
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Answered by Han Y. • Biology tutor
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