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Describe the structure and function of the myelin sheath?

The myelin sheath is a fatty substance which surrounds and insulates neuron axons (i.e. it does not allow potassium or sodium ions to pass through it), which allows fast propagation of action potentials alon...
EC
Answered by Emma C. • Biology tutor
18035 Views

Explain the flaws of Utilitarianism?

Utilitarianism is a legal doctrine formulated by Jeremy Bentham in the 18th century, it is a consequentialist school of thought which locates the morality in the consequences of an act. Exemplified by the Li...
KH
Answered by Kristian H. • Law tutor
5060 Views

Distinguish the mens rea element of a crime from the actus reus element.

The mens rea requirement of a crime is the mental element part. For example, having the intention or knowledge of the wrongdoing. Differently, the actus reus element is the conduct part of the crime, for exa...
AP
Answered by Abi P. • Law tutor
9209 Views

Show that x^2 - x +2 is positive for all values of x

(x-1/2) 2 = (x-1/2)(x-1/2)=x 2 -x+1/4, add 7/4 to get x 2 -x+2 therefore x 2 -x+2 = (x-1/2) 2 + 7/4 squared numbers always positive so (x-1/2) 2 >= 0 therefore (x-1/2) 2 + 7/4 is always positive
PM
Answered by Pearse M. • Maths tutor
12049 Views

Vectors a and b are defined by a = 2i + 3j and b = 4i - 2j, find 3a-b in terms of i and j

3a = 6i + 9j -b = -4i + 2j 3a-b = (6i-4i) + (9j+2j) = 2i + 11j
PM
Answered by Pearse M. • Maths tutor
7926 Views