Why does a brain look like a brain? The real secret is inside a bunch of fat more
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Immerse Education Essay
Why does a brain look like a brain? The real secret is inside a bunch of fat. (more about brain functioning and a bit about psychology) "Every time we learn a fact, our brain changes." Most of us will first think of a heart whenever we talk about our most important part of the body. However, the brain is the most complex and crucial part of the human body that regulates it. This three-pound organ, which lies in its bony shell and is washed by a protective fluid, is defined as the crown jewel of the human body. The brain is about 60% fat, and the remaining 40% is a combination of water, protein, carbohydrates, and salts. The brain itself is not a muscle. It contains blood vessels and nerves, including neurons and neuroglia cells. The human brain has more than 100 billion neurons, and every neuron has a specific function and a certain duty. In order to understand the brain, we must examine its parts and functions, which are the cerebrum, cerebellum, and brainstem, and the functions within those. However, the main question is, How does the brain work?" And do we use our brain to its full potential? The brains of all species are composed primarily of two broad classes of cells: neurons and glial cells. Glial cells come in more than a few types and perform some critical functions: structural support, metabolic support, insulation, and direction of development. Neurons, however, are usually measured as the most important cells in the brain. The property that makes neurons unique is their ability to guide signals to explicit target cells over long distances by means of axons (thin protoplasmic fibers). Typically, neurons share information by producing electrical events called action potentials or nerve impulses, which involve rapid changes in voltage across their membrane. When a neuron’s dendrite or cell body gets sufficient inputs from other neurons by means of chemical or electrical neural connections and a specific limit for that neuron is surpassed, the neuron is activated to send an action potential over its axon. "Overall, action potentials are all-or-nothing signals because their response is usually the same amplitude and duration. The strength and duration of a stimulus determine the frequency of the action potentials produced. The stronger a stimulus and the longer it lasts, the greater the action potential frequency, which results in more information being passed along the neural circuit. For example, a louder sound stimulus will activate a greater number of action potentials" (The scientist, "How do neurons work?"). The brain develops an unpredictably coordinated grouping of stages. It changes its shape from a basic swelling at the front of the nerve cord within the embryonic stages to a complex cluster of regions and associations. Neurons are made in zones that contain stem cells and move through the tissue to reach their areas. Once neurons have situated themselves, their axons grow and navigate through the brain, branching as they go, until the tips reach their targets and form synaptic connections. In several parts of the nervous system, neurons and synapses are produced excessively during the early stages, and then the unneeded ones are pruned away. There is a widespread and common (maybe wrong) concept among scientists, mainly neurologists, that says neurons represent about 10% of all cells in the human brain and that we only use 10% of our brain. However, there is no significant evidence to suggest that we only use 10 percent or any other specific or limited proportion of our brain. On the contrary, all existing information shows that we use 100% of it. Even if that myth were true, people cannot imagine what could be reached through the extension of brain usage: thought transmission, extremely high intelligence, and telekinesis. I would like to mention two reasons why the concept is not true. Firstly, our brain takes up 2% of our total body weight and uses 20% of our energy. Is it possible to use up to 20% of the whole energy if it only works by 10%? Secondly, all the regions of the brain with their special functions are known, which means we can create a map of them. This makes it clear that there would be no inactive 90%. Download 111.61 Kb. Do'stlaringiz bilan baham: |
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