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Humans need to remove (excrete) waste products from the bloodstream. Describe the processes that produce waste products and how the products are removed from the body. (6 marks)

Urea is produced via the breakdown of amino acids in the liver, which is removed from the blood by the kidneys and excreted in urine . Carbon dioxide is a waste product of respiration in cells and is breathe...
KJ
Answered by Kizzy J. • Biology tutor
23332 Views

How do you work out the tangent to a circle at a given point on the circle?

(Suppose the coordinates of the point on the circle is (2, 3))To calculate the tangents equation we will first work out it's gradient. The tangent to a circle at a point is perpendicular to the radius of the...
JH
Answered by James H. • Maths tutor
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An individual is seated in a darkened room. What would you expect their pupils to look like? A light is shone onto their eyes and a change in their pupils is noted, what change would you expect and why?

In dark/dim conditions the human pupil dilates (diameter increases) to allow more light in.In bright conditions the pupil constricts (diameter decreases) and less light enters the eye.This is through a combi...
TB
Answered by Tom B. • Biology tutor
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what exactly is the purpose of a sketchbook and how do I meet the criteria?

Although having good quality artwork in your sketchbook is important, its primary purpose is to support your final pieces. Therefore at least 50% of the page should be writing. The sketchbook is there to exp...
MB
Answered by Madison B. • Art tutor
3517 Views

Express 5/8 as a decimal

Note that 1/4 as a decimal is 0.25, half of this is 1/8 which is 0.125.Multplying this by 5: we get 0.625
JM
Answered by James M. • Maths tutor
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