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1. The presynaptic action potential reaches the synaptic knob. 2) The terminal is depolarised. 3) Voltage gated calcium channels in the presynaptic knob open. 4) Calcium enters through the calcium chan...

There are 6 stages to this theory. 1) Attachment is adaptive and innate. This is because it promotes survival, resulting in attachment behaviour to become innate. 2) Social Releasers, e.g. smiling, crying...

The key thing to understand here is that freight transport is a derived demand because it arises as a consequence of an increase of demand for something else. In this case, GDP is increasing therefore the...

Making off without payment is defined under S.3 Theft Act 1978. A person may be found guilty of the offence if they dishonestly make off from the spot where payment is required or expected for goods suppl...

For x!=0, multiply the equation by x to get x^4+5x^2+1=0. Then substitute t=x^2 where t>=0. So the equation has a form t^2+5t+1. Then find the discriminant and two roots. One of the roots t2<0 doesn...