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How do signals cross a synapse

action potential arrives at post synaptic terminal 2. voltage gated calcium channels open 3. calcium enters presynaptic neuron and move to neurotransmitter vesicles 4. vesicles move to membranes and dock 5. ...
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Answered by Sian R. • Biology tutor
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Contrast the processes of facilitated diffusion and active transport (3 marks)

Note that the question is 3 marks. Also note the question uses the word 'contrast' so you must talk about both processes. Cells must communicate with their external environment and vice versa, therefore, sub...
Answered by • Biology tutor
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How does Milton show that love is possessive in Paradise Lost (books 9 and 10)?

Milton makes possible a reading of Eve, his main female character, as a femme fatale. This is a woman who through her power of seduction and female charm gains power over male characters. Milton thus develop...
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Using your knowledge of periodicity and atomic structure, why does the first ionisation energy decrease moving down a group yet increase moving along a period in the periodic table?

Moving down a group means that the shielding of the outer electrons is increased due to the greater number of inner electron shells within the atom - these are between the nucleus and the outer electrons. As...
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Answered by Alfie I. • Chemistry tutor
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To what extent was Hippocrates influential in medicine? Use examples of Hippocrates' work in your answer.

The extent to which Hippocrates influenced medicine can be debated in many different ways, however, some of the most crucial and innovative movements within medicine throughout history have arguably been a r...
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Answered by Jodie D. • History tutor
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