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How is a nerve impulse transmitted along a synapse?

The nerve impulse arrives at the synapse. This triggers vesicles to release chemical messengers (neurotransmitters) into the synapse. These chemicals diffuse across the synapse and bind with membrane recepto...
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Answered by Alex H. • Biology tutor
3491 Views

To what extent were the reforms of Tsar Alexander II genuine?

The word genuine is ambiguous and as such it is impossible to say whether the emancipation of the serfs was Tsar Alexander II’s only genuine reform. To ascertain a response to this question two meanings will...
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Answered by Kendya G. • History tutor
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Can you explain the food chain?

You always start with the sun which gives its every to grass which is a producer of energy. The arrow in the food chain, therefore, travels in the direction the energy travels in (in this case from the sun t...
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Answered by Amelia H. • Biology tutor
4425 Views

What is crude oil and how does fractional distillation work?

Crude oil is formed from detritus (dead living matter) of animal, plants and microscopic organisms under intense pressure and temperature. It is trapped under impervious rocks which stop the liquid and gas f...
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Answered by Amelia H. • Chemistry tutor
6235 Views

When do I use the French subjunctive?

The subjunctive mood (NB: NOT tense) in French is primarily a means of expressing uncertainty - something that you wish, hope or fear, rather than something that is definitely the case. This textbook-style d...
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Answered by Sarah M. • French tutor
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