Top answers

How does an action potential work?

Resting potential at - 75mV Stimulus causes opening of sodium channels and influx of sodium ions, membrane becomes less polarized Threshold potential reached at -55mV, opening of many more sodium channels, g...
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Answered by Catherine H. • Biology tutor
3398 Views

How do you form the imperfect tense in French?

Take a regular verb, e.g. jouer-to play. Conjugate it in the 1st person plural, I.e. nous. E.g. jouer= jouons Take off the -ons, to leave the stem. E.g. jou Add on the imperfect endings to the stem. Je-ais, ...
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Answered by William W. • French tutor
2535 Views

What is the electron acceptor used in photosynthesis

NADP
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Answered by Bianca S. • Biology tutor
3262 Views

How does fractional distillation work?

Different length hydrocarbon chains are separated by their different boiling points as longer chains will have stronger intermolecular attractions. The crude oil is heated and injected into the base of the c...
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Answered by Bianca S. • Chemistry tutor
5236 Views

How is a polar bear adapted for it's environment? (4 marks)

Polar bears are well adapted for survival in the Arctic: White fur to camouflage themselves from prey on the snow and ice. Thick layers of fat and fur for insulation against the cold. Small surface area to v...
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Answered by Ruwani M. • Biology tutor
10513 Views