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Meiosis is the process of cell division that produces two identical diploid cells, and consists of four stages.

The first stage is called prophase, where the chromosomes condense and cross over to ...

There are many enzymes which are crucial for replication. The first is helicase which unwinds the double helix at the replication fork. DNA gyrase then reduces the strain...

When an action potential from a pre-synaptic neuron approaches a synapse, the change in membrane potential causes voltage-gated calcium ion channels to open across the pre-synaptic bulb. Due to the high d...

ADH is a hormone that decreases the urine output in humans. It is produced by the hypothalamus and secreted by the posterior pituitary gland. The production is controlled by osmoreceptors and baroreceptor...

The cell membrane consists of a mosaic of proteins and a phospholipid bilayer, with the hydrophobic fatty acid tails orientated inwards and the hydrophilic phosphate heads outwards. The main function is t...