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ADH stands for anti-diuretic hormone. It is a hormone that increases the permeability of the distal convoluted tubule and the collecting duct to water ADH is produced in the hypothalamus and stored in the pi...

Gas exchange surfaces tend to have the adaptation a large SA:volume ratio. This is advantageous as it increases the area over which gases and other materials can be transported into and out of the organism, ...

Nerve impulses are propagated in the form of action potentials, involving the rapid depolarisation of the nerve cell membrane from -70mV to +30mV, before repolarisation occurs returning the membrane potentia...

This is a common and understandable mistake that is made since essentially both of these processes refer to molecules being moved out of the cytoplasm of a cell using energy. There is however a major differe...

Succession is the term given to describe the changes that take place within an ecosystem. Barren land such as bare rock can be formed by the eruption of a volcano or a glacier retreating. The first stage of ...