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Biology
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Explain the all-or-nothing principle for an action potential.

In the resting state, the membrane potential of a neuron is around -70 millivolts (mV). When acted upon by a stimulus, the membrane depolarises as Na

OC
Answered by Oyku C. Biology tutor
58981 Views

Explain how hydrogen bonding occurs between molecules of water.

Hydrogen Bonding occurs between 2 adjacent molecules of H2O.

The polar covalent bond between oxygen and hydrogen creates negative and positive partial charges respectively.

There ...

TH
Answered by Tom H. Biology tutor
16251 Views

Give 3 differences between DNA and RNA

RNA is single stranded whereas DNA is double stranded

RNA has uracil whereas DNA has thymine

RNA contain the pentose sugar ribose whereas DNA has deoxyribose

OH
Answered by Oliver H. Biology tutor
5493 Views

How does glycolysis produce ATP?

Glycolysis produces energy through the form of ATP. ATP is created directly from glycolysis through the process of substrate-level phosphorylation (SLP) and indirectly by oxidative phosporylation (OP). Th...

CH
Answered by Charlie H. Biology tutor
30566 Views

Why do different blood vessels have different lumen sizes (relative to their overall size)?

Lumen sizes in blood vessels differ due to the differing functions of the vessels themselves.

Arteries have to carry oxygenated blood away from the heart to the tissues at high pressure. Small lume...

JS
Answered by Jessica S. Biology tutor
71510 Views

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