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How is the concentration of blood and urine controlled by the body? (6 marker)

Concentration of urine is controlled by the hormone ADH (anti-diuretic hormone)This hormone is released into the bloodstream; by the posterior pituitary glandIf the water concentration in the blood is too hi...
RA
Answered by Rayyan A. • Biology tutor
4318 Views

How should I approach a comparative essay between Things Fall Apart and Heart of Darkness?

There are a variety of ways of approaching the structure of a comparative essay. I find the most effective method in achieving a high-grade essay is to run a comparison throughout the essay, rather than focu...
KM
Answered by Kate M. • English tutor
3607 Views

y is proportional to x^2. When y=45, x=3. Find a formula for y in terms of x.

If y is proportional to x then you can write y=kx^2 where k is a constant you are trying to find. Then substitute in the values you have been given for x and y. This gives you 45=k(3)^2. Then work to solve t...
AP
Answered by Abbey P. • Maths tutor
19589 Views

What is the difference between the perfect and imperfect tenses in French and when are they used?

There are mainly two tenses used in French to discuss what happened in the past, these being: the perfect and imperfect.However, both of these tenses are used in different ways based on what the speaker inte...
JH
Answered by Joe H. • French tutor
5736 Views

Find the inverse of a 2x2 matrix

Consider the 2x2 matrix M , consisting of elements a , b , c and d . To find its inverse one must first find the determinant of M . This is achieved by calculating the result of the expression ad - bc . The ...
GD
Answered by Giovanni D. • Maths tutor
5713 Views