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How is the concentration of sodium altered in a cell in the intestines and why is glucose absorption affected?

Imagine a cell like a rectangle, of which one side has finger-like projections (this side faces the intestinal lumen) called the villi, and the other side is flat - the base membrane of that cell that is. On...
AT
Answered by Antonis T. • Biology tutor
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Find the equation of the tangent to the unit circle when x=sqrt(3)/2 (in the first quadrant)

Unit circle: x 2 + y 2 = 1 when x = sqrt(3)/2: y 2 = 1 - (sqrt(3)/2) 2 y 2 = 1 - 3/4 y 2 = 1/4 y = 1/2 or -1/2 (first quadrant, so y is positive, i.e. y = 1/2) find gradient at (sqrt(3)/2, 1/2): x 2 + y 2 = ...
KJ
Answered by Kiran J. • Maths tutor
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What is the rate of a reaction and how can you determine it experimentally?

The rate of a reaction is the rate at which reagents are used up and product are formed. Reaction rates depend on concentration. A typical rate law is rate=k*[A] m *[B] n . To find the values of m and n we w...
AC
Answered by Antonia C. • Chemistry tutor
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Integral of (2(x^3)-7)/((x^4)-14x)

Set f(x)= (x^4)-14x. f’(x)=4(x^3)-14=2(2(x^3)-7). Thus we can write (2(x^3)-7)/((x^4)-14x)=(1/2)f’(x)/f(x). The integral of f’(x)/f(x)=ln|f(x)|+c. Thus the integral of (2(x^3)-7)/((x^4)-14x) is (1/2)(ln|f(x)...
IK
Answered by Issy K. • Maths tutor
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Compare how Milton and Ford present sining in relation to Milton’s Paradise Lost Book IX and Ford’s ‘Tis Pity She’s A Whore.

Plan for essay John Milton’s Paradise Lost Book IX and John Ford’s ‘ Tis Pity She’s A Whore explore the causes and consequences of sin. Para 1- In both works sin is encouraged by false logic, that of man and...
AC
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