Search over 10,000 free study notes

• When the action potential reaches the pre-synaptic knob, voltage gated Ca²⁺ channels open which allows Ca²⁺ into the pre-synaptic knob - This causes vesicles which contain neur...

Since the key word is contrast infomation about both facilitated diffusion and active transport is needed.

Facilitated diffusion does not require ATP whereas active transport does ...

Triacylglycerides are a type of lipid composed of a glycerol head and three fatty acid tails. The fatty acid tails are long hydrocarbon chains which are non polar and so hydrophobic, and this is what caus...

Myelination is the production of a myelin sheath - a fatty, electrically insulating layer formed by Schwann cells wrapping around the axons of neurons. This sheath is not continuous, there are gaps betwee...

Process- key words from mark schemes are highlighted in bold 1. The enzyme DNA helicase breaks the hydrogen bonds linking base pairs of DNA. As a result, ...