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The alveoli are highly folded in order to increase the surface area available for gas exchange. The thins walls of the alveoli and the supplying capillaries allow for a short diffusion distance, thus increas...

Both mitosis and meiosis are processes of dividing a diploid cell, however there are a number of key differences. Mitosis results in two genetically identical, diploid, daughter cells and takes place during ...

The membrane is at resting potential, -60mV inside compared to outside. It is polarised . 2. Na+ ion channels open and some Na+ ions diffuse into the neurone. 3. The membrane depolarises - it become less neg...

Both of these are key steps in gene expression to obtain proteins. Transcription occurs first. It is the process, happening in the nucleus, where a specific segment of DNA is copied into RNA to form messenge...

This is part of the chemistry of life chapter. Its important to Biology because : Water is the medium of life and biology is the study of life. Water molecules are polar. this means the molecule is charged O...