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Kidney function
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A. regulating ECF volume & BPb. regulating osmolarityc. maintaining ion balanced. regulating pHe. excretion of waste & foreign substancesf. production of hormones (renin, erythropoietin, converts VitD3)
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Body parts of the urinary system
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A. kidneyb. renal arteryc. renal veind. renal pelvisf. ureterg. urinary bladderh. urethra
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The nephron and its function
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A. function unit of the kidneyb. arranged to give rise to distinct regions of the kidney c. consists of a vascular and tubular component.
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Two regions of the kidney
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A. renal cortex - outer regionb. renal medulla - inner region
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The nephron's vascular component
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A. glomerulusb. afferent arteriolesc. efferent arteriolesd. peritubular capillaries
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Glomerulus
nephron's vascular component |
A. ball like tuft of capillariesb. H2O are solutes are filtered from the bloodc. composition of filtrate is similar to plasma but will eventually be converted to urine by the tubular component
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Afferent arterioles
nephron's vascular component |
Supply blood to the glomerulus
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Efferent arterioles
nephron's vascular component |
A. carry blood NOT filtered by the tubular component from the glomerulusb. is an arteriole because NO O2 or nutrients are delivered nor wastes picked up by glomerulus
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Peritubular capillaries
nephron's vascular component |
A. supplies kidney with blood b. intertwined around the tubular componentc. importnat in the exchange between blood & tubular system to create urine
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Blood flow in the kidneys
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The nephron's tubular component
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= a single tube, single layer of cells
a. Bowman's capsuleb. proximal tubulec. Loop of Henled. Juxtaglomerular apparatuse. distal tubulef. Collecting duct |
Bowman's capsule
The nephron's tubular component |
An expanded double-walled invagination cupping the glomerulus
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Proximal tubule
The nephron's tubular component |
A. located entirely within the cortexb. contains filtered fluid
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Loop of Henle
The nephron's tubular component |
A. hairpin loop that dips into the medullab. descending limb - enters the medullac. ascending limb - returns to cortex
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Juxtaglomerular apparatus
The nephron's tubular component |
A. lies between the 2 forks of the afferent and efferent arterioles beside the glomerulusb. plays an important role in regulating kidney function
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