about nervous system big matter
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THE NERVOUS SYSTEM :
The nervous system of the human body is responsible for sending, receiving and processing nerve impulses. It controls the actions and sensations of all the parts of the human body as well as your thoughts, emotions and memories. The nervous system is a "speedy electrochemical communication system of all the nerve cells of the peripheral and central nervous system". The most basic and important part in the usefulness of the Nervous System is the Neuron.
The neuron is the functional unit of the Nervous System consisting of 100 billion neurons in 1 human brain alone. While they vary in size and shape, all neurons have 3 identical parts that enable them to function. The first part of a neuron, …show more content…
The Peripheral NS consists of the "sensory and motor neurons that connect the Central NS to the rest of the body". It consists of two components, the Somatic nervous system, which controls the movements of our skeletal muscles and the Automatic nervous system, which controls the glands and muscles of our internal organs. The automatic nervous system is a dual system that has influence over the heartbeat, digestion, and glandular activity. These two systems which make up the automatic NS are known as Sympathetic and Parasympathetic NS. The Sympathetic NS stimulates the body for defensive performance. If someone should become frightened or infuriated about something, the sympathetic NS will accelerate the bodies heartbeat, raise blood sugar and dilate your arteries to prepare you for action. When someone feels stressed, their Parasympathetic NS produces opposite effects such as decreasing the heartbeat and lowering blood sugar in an attempt to relax the body. On a daily basis, these two systems work together so that the body can remain in a stable interior condition.
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