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The heart is essential and plays a vital role in the distribution of blood around the body. The circulation system is comprised of two organs: heart and lung. The heart has vessels bringing blood into it ...
Osmosis is a passive process by which water achieves equilibrium through a semi-permeable membrane, moving down a concentration gradient. Water will move from where it is in high concentration (ie in a lo...
It's all due to a process called osmosis and the movement of water from a high water potential to a place of low water potential, passing through a partially permeable membrane. So what does this mean? If...
The capillaries are very small blood vessels in the body that take the blood to the individual body cells. They transport oxygen and nutrients to the cells ( the cell needs these to survive) and remove ca...
The action potential reaches the pre-synaptic knob causing depolarisation. This causes voltage-gated calcium channels in the pre-synaptic membrane to open. Calcium ions enter the pre-synaptic knob through...
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