<span>The spinal cord is the foremost road for message attaching the brain and external nervous system.</span>
The body's spinal cord is preserved through the osseous spinal string pointed to the left side. The spinal string is produced of osseins named vertebrae / the backbone. Despite the spinal string is slightly adjustable, few of the vertebrae in the inferior segment of the spinal string displays wick.
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This part examines the structure of the smallest functional unit of muscle tissue - the sarcomere - and how these units function in order to shorten or contract a muscle.
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Caffeine and the other xanthines block the brain's receptors for a substance known as Adenosine , which is a neurotransmitter or neuromodulator.
The most popular central nervous system stimulant is caffeine. There are three main ways that caffeine affects the central nervous system that have been identified. Only at high non-physiological caffeine concentrations do intracellular calcium mobilisation and specific phosphodiesterase inhibition take place. The antagonism at the level of adenosine receptors is the only likely mechanism of action of the methylxanthine. Caffeine causes a relative brain hypoperfusion by increasing energy metabolism throughout the brain while simultaneously decreasing cerebral blood flow. Caffeine appears to affect the local release of dopamine by activating noradrenaline neurons. Many of caffeine's arousing effects could be attributed to the methylxanthine's effects on serotonin neurons.
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decomposers help an ecosystem by breaking down dead plants and animals
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the action or state of setting someone or something apart from other people or things or being set apart.
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