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How do neurotransmitters transmit action potentials across synapses?

The process can be broken down into 3 main stages. 1 - An Action Potential triggers Calcium Influx: when the action potential arrives at the synaptic knob of the presynaptic neurone, it stimulates voltage-ga...
TS
Answered by Trishnaah S. • Biology tutor
4103 Views

Explain how CH3CH2CHO can react with a Grignard reagent to produce CH3CH2CH(OH)CH2CH3. State the reagents and give the mechanism.

Use the Grignard reagent CH 3 CH 2 MgBr. CH 3 CH 2 CHO + CH 3 CH 2 MgBr ---> CH 3 CH 2 CH(OH)CH 2 CH 3 step one: add Grignard reagent.step two: work up with H + /H 2 0.Mechanism on whiteboard.
JC
Answered by Jenny C. • Chemistry tutor
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How do lines 4–9 (verum Acerronia ... infertur) give a strong impression of Agrippina's quick thinking and intelligence?

During the shipwreck, Tacitus throws emphasis on Agrippina’s quick thinking and intelligence by juxtaposing the character with her companion, Acerronia. While Acerronia is defined by the qualifying “impruden...
RM
Answered by Rory M. • Latin tutor
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Explain why a mutation in the viral RNA leads to a change in the 3D shape of the protein antigens (3 marks)

A mutation in the viral RNA results in a change in the RNA base sequences. This can result in a change in the amino acid sequence during translation. This then changes the position of intramolecular bonds, s...
VK
Answered by Virad K. • Biology tutor
13279 Views

The line PQ is the diameter of a circle, where points P and Q have the coordinates (4,7) and (-8,3) respectively. Find the equation of the circle.

Start by using the formula d = sqrt((x 2 -x 1 ) 2 +(y 2 -y 1 ) 2 )Therefore, substituting in our coordinates from P and Q:Length PQ = sqrt((-8-4) 2 +(3-7) 2 )= sqrt((-12) 2 +(-4) 2 )= sqrt(160)= sqrt(16) x s...
MC
Answered by Matt C. • Maths tutor
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