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A stimulus at the receptor end of the neuron causes the membrane to become more permeable to Na+ ions. Because there is a higher concentration of Na+ on the outside of the cell the flood into the cell dow...
Two populations become separated by a barrier such as sea (geographical separation). As a result populations cannot interbreed, hence gene flow between two populations is prevented. As a consequence, only...
Both are forms of treatment for kidney failure so the blood is left unfiltered as this is one of the main functions of the kidneys. In haemodialysis all of the blood is filtered and it is done externally ...
An action potential arriving at the pre-synaptic membrane stimulates voltage-gated calcium channels to open and calcium ions diffuse into the neuron through these calcium channe...
Type 1 diabetes mellitus occurs when the body's immune system attacks beta cells within the Islets of Langerhans, in the pancreas. The immune system recognises pancreatic self-antigens as foreign and begi...
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