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The structure of a neuron can be described as a cell body with nerve processes that transmit signals from one neuron to another. Nerve processes exist as either dendrites or axons. More »

www.reference.com Science Human Anatomy Nerves

Hemoglobin is a complex protein molecule made up of four subunits of polypeptides, or globins, which are chains of amino acids. These globin subunits bind to non-ptorein heme groups containing an iron ion, which can bind... More »

www.reference.com Science Human Anatomy Blood

Capillaries are composed of endothelium, which is a form of simple squamous epithelial tissue. Capillary walls are thin and only 5-10 microns wide, so red blood cells can only flow through them in single file. More »

www.reference.com Science Human Anatomy Blood
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Bundles of nerve processes within the central nervous system are called fasciculi, tracts or funiculi, depending upon their size. All of these are types of neural pathways, cords of white neural matter that connect diffe... More »

www.reference.com Science Human Anatomy Nerves

The function of the axon terminal is to transmit a neurotransmitter from one neuron to another. The neurotransmitter is released from the end of the axon of one neuron and binds to the dendrites of the target neuron. Neu... More »

www.reference.com Science Human Anatomy Nerves

The basic unit of the nervous system is the neuron, or nerve cell. Neurons are distinguished from other cells by their ability to communicate with other neurons through synaptic transmission and form highly structured co... More »

www.reference.com Science Human Anatomy Nerves

All-or-nothing neuron activation means that the neuron is either on or off. When a neuron fires, it is called and action potential. There is no in-between state, and all action potentials have the same magnitude. More »

www.reference.com Science Human Anatomy Nerves