
PROCESSES IN THE NEPHRON
1. Renal Corpuscle:
1. BOWMAN'S CAPSULE/PRESSURE FILTRATION:
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Is a double-walled cup that lies in the CORTEX region of the kidney
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It functions to catch and collect filtrate from the glomerulus capillaries
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It encloses a capillary network called the glomerulus
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THE GLOMERULUS AND BOWMAN'S CAPSULE MAKE THE RENAL CORPUSCLE (**this will be on the test**)
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The outer layer of the capsule is separates from the inner layer by a CAPSULAR SPACE
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The passage of water and solutes at the glomerulus and the formation of the glomerular filtrate depends on the pressure at the afferent arteriole.
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If the pressure rises then filtration rate rises, if the pressure decreases the filtration rate does as well.​
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This pressure is so well regulated by the body that the filtration rate per day stays almost constant!​
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After the formation of filtrate, selective reabsorption and secretion modify the urine depending on our bodies needs.
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Blood pressure forces small particles and water to be squeezed into the Bowman's capsule from the glomerulus capillaries.
FILTRATE COMPOSITION: (small molecules that diffuse into the Bowman's capsule during pressure filtration)
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Water, Glucose/Amino Acids/ Hydrogen Ions, Salts like NaCl, Urea, Bicarbonate Ions (HCO3), some toxins
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EFFERENT ARTERIOLE COMPOSITION: (large molecules that stay in the blood after pressure filtration)
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Red Blood Cells, White Blood Cells, Plasma Proteins, Platelets


