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What does osmosis mean and what does the movement of water do to cells?

Osmosis can be defined as "the movement of water from an area of high water concentration to an area of low water concentration across a selectively permeable membrane". What this means, is that wa...
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Answered by Matilda T. • Biology tutor
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Discuss the reasons for and consequences of separatism with one example. (5)

Separatism is usually a feeling of isolation associated with a certaing roup of people or the region that they live it. Feelings of separatism can arise because the region feels economically depressed by a s...
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Answered by Eleanor A. • Geography tutor
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Describe the changes that take place to maintain glucose concentration in exercise.

During exercise, blood glucose concentration falls due to the increased energy demand and glucose uptake of skeletal muscles. This fall in glucose concentration is detected by the alpha and beta cells in the...
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Answered by Henry B. • Biology tutor
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How can I improve my personal statement?

My first tips would be to: Avoid any cliché sentences. Do not use hyperbole to describe your passions as this will come across as insincere. Instead, demonstrate your enthusiasm by engaging with what you hav...
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C4 June 2014 Q4: Water is flowing into a vase. When the depth of water is h cm, the volume of water V cm^3 is given by V=4πh(h+4). Water flows into the vase at a constant rate of 80π cm^3/s. Find the rate of change of the depth of water in cm/s, when h=6.

This question wants us to find: dh/dt . We are given: dV/dt=80π and V=4πh(h+4) . The equation to use here is: dh/dt = dh/dV x dV/dt. We know dV/dt, but still need to find dh/dV . For this, we can use the rec...
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Answered by Suban K. • Maths tutor
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