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Describe how oxygen in the air reaches capillaries surrounding alveoli in the lungs. Details of breathing are not required. (AQA Biol. 2016)

Oxygen diffuses from the air where it is present at a higher concentration and pressure, to the lungs where it is at a lower concentration and pressure - we say it moves 'down' these gradients; high to low. ...
DM
Answered by David M. • Biology tutor
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‘Governments are the most important players in regeneration’, to what extent is this true for an example you have studied?

A government is a group of people who have authority to govern a country or state and have the power to make decisions that involves the society and the economy. They play a key role in major decisions that ...
UN
Answered by Udara N. • Geography tutor
6772 Views

Curve D has equation 3x^2+2xy-2y^2+4=0 Find the equation of the tangent at point (2,4) and give your answer in the form ax+by+c=0, were a,b and c are integers.

Differentiate the equationdy/dx=6x+2x(dy/dx)+2y-4y(dy/dx)Set this equal to zero and solve for dy/dx which gives:dy/dx=(2y+6x)/(4y-2x)For x=2 and y=4 dy/dx=5/3(y-y o )=m(x-x o )y-4=(5/3)(x-2)Thus, the equatio...
VD
Answered by Vasileios D. • Maths tutor
5790 Views

How do I go about writing my Oxbridge personal statement?

Think about talking to someone about what you want to study at university: what would you say? What have you read, watched, seen or done that has inspired you? This could be anything: something you did at sc...
SB
1880 Views

How can I prepare for my MMI interviews?

First of all I hope you already know what MMI interviews are, how they are be structured, and which universities you are applying to have this system. Through MMI, the interviewers are looking to see if you ...
HN
1936 Views