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Every one of us depends on the process of urination for the removal of certain waste products in the body. The production of urine is vital to the health of the body. Most of us have probably never thought of urine as valuable, but we could not survive if we did not produce it and eliminate it. Urine is composed of water, certain electrolytes, and various waste products that are filtered out of the blood system. Remember, as the blood flows through the body, wastes resulting from the metabolism of foodstuffs in the body cells are deposited into the bloodstream, and this waste must be disposed of in some way. A major part of this "cleaning" of the blood takes place in the kidneys and, in particular, in the nephrons, where the blood is filtered to produce the urine. Both kidneys in the body carry out this essential blood cleansing function. Normally, about 20% of the total blood pumped by the heart each minute will enter the kidneys to undergo filtration. This is called the filtration fraction. The rest of the blood (about 80%) does not go through the filtering portion of the kidney, but flows through the rest of the body to service the various nutritional, respiratory, and other needs that are always present.
The three basic physiological processes in urine formation are filtration, reabsorption, and secretion. Filtration occurs in the glomerulus, where blood is filtered to form the initial filtrate. Reabsorption involves the selective reabsorption of substances like water, electrolytes, and glucose back into the bloodstream. Secretion is the process by which substances are actively transported from the blood into the urine to be excreted.
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The three basic types of unconformities:angular unconformities, disconformities, and nonconformities.
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3
What three processes are involved in the formation of an unconformity?
The three basic types of unconformities:angular unconformities, disconformities, and nonconformities.
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The three basic steps are erosion (weathering), transport (carrying silt), and deposition (carried load settles out).
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false
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Cognitive Anxiety Physiological arousal performance
What are three physiological processes involved in absorption?
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What process are involved in formation of a delta?
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What are three main processes involved in clastic rock formation?
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What are the three physiological zones?
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