C2 [ I or T ] If you drain something, you remove the liquid from it, usually by pouring it away or allowing it to flow away, and if something drains, liquid flows away or out of it: 1  Drain the pasta thoroughly. 2  We drained the pond and filled it with fresh water. 3  Drain (off) any liquid that is left in the rice.
5. Mitochondrium-this is the part of the cell responsible for the supply of energy in the form of ATP (adenosine triphosphate). Neurons need an enormous amount of energy. The brain is one of the most metabolically active tissues in the body.In man, for example, the brain uses 40 ml of oxygen per minute.t is from here that the electrical firing known as an action potential usually occurs. 5. Nerve Ending (Presynaptic Terminals) Synapses are the junctions formed with other nerve cells where the presynaptic terminal of one cell comes into 'contact' with the postsynaptic membrane of another.
A typical neuron has all the parts that any cell would have, and a few specialized structures that set it apart. The main portion of the cell is called the soma or cell body. It contains the nucleus, which in turn contains the genetic material in the form of chromosomes.Neurons have a large number of extensions called dendrites. They often look likes branches or spikes extending out from the cell body. clump of neuron cell bodies, for example, is called a ganglion (plural: ganglia) or a nucleus (plural: nuclei). A fiber made up of many axons is called a nerve. In the brain and spinal cord, areas that are mostly axons are called white matter, and it is possible to differentiate pathways or tracts of these axons.