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Name and outline the two types of circulatory systems

A single circulatory system is where blood flow starts with deoxygenated blood being pumped by the heart to the lungs or gills and then travelling directly to the rest of the body’s tissues. Found in fish...

Answered by Bianca S. • Biology tutor

7971 Views

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 s...

Answered by Catherine H. • Biology tutor

3176 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
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Answered by William W. • French tutor
2328 Views

What is the electron acceptor used in photosynthesis

NADP

Answered by Bianca S. • Biology tutor

3027 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 th...

Answered by Bianca S. • Chemistry tutor

4977 Views