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The membrane of an axon contains a large number of protein channels along its length, which all fall under three categories: the sodium/potassium pumps, the voltage-gated sodium channels & the volt...
The Theory of Evolution states that organisms change (evolve) over a long time (from simple life forms) due to natural selection.
Natural Selecti...
DNA is a double helix. Consisting of two strands, which are made up of bases A T C and G
Complementary base pairing occ...
ATP is responsible for cocking (pulling back) the myosin head, ready for another cycle. When it binds to the myosin head, it causes the cross bridge between actin and ...
The lung consists of one cell thick bronchioles, which feed into round structures called alveoli, which are round in shape and also one cell thick. The bronchioles and...
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