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The polymerase chain reaction (or PCR) is extremely useful at copying fragments of DNA so by the end of it you have a much bigger sample than what you started with. This is particularly useful for example, i...

Primarily, the function of synapses is allow communication between nerones in the nervous system. Additionally, the structure of synapses means that they can perform further functions. Specific receptors for...

A gene is a section of DNA used to produce a single polypeptide, or protein molecule, which is made of amino acids. The process of protein synthesis can be divided into two parts. The first part is transcrip...

The nerve impulse arrives at the pre-synaptic knob. Gated voltage-sensitive calcium ion channels open and calcium ions rapidly diffuse into the pre-synaptic knob. The influx of calcium ions stimulates synapt...

Logging and subsequently harvesting trees removes nutrients, like phosphates, from the system. The removal of the vegetation that would also normally act as a protective cover and windbreak increases the rai...