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24 Cards in this Set
- Front
- Back
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which type of nephron is 85% of all nephrons |
cortical |
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where are most cortical nephrons located |
within the superficial cortex of the kidney |
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what is the nephron loop of a cortical nephron like |
relatively short. may go a little into the medulla |
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what is the major function of cortical nephrons |
most of the reabsorptive and secretory functions of the kidney |
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which type of nephrons is 15% of nephrons
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juxtamedullary nephrons |
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what are the nephron loops (loops of henley) like in juxta, nephrons |
long that extend deep into the medulla |
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what do the capillaries of the juxta. nephrons connect to |
the vasa recta |
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what is the vasa recta |
long straight capillaries that run parallel with the nephron loop |
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what is the function of the juxta. nephrons |
making concentrated urine |
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the renal corpuscle includes what |
the bowman's capsule and glomerulus |
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what is the bowman's capsule (glomerular) |
forms the outer wall of the renal corpuscle encapsulates glomular capllaries |
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where does the glomerular capsule connect |
to the initial segment of the renal tubule |
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what is the outer wall of the glomerular capsule |
simple squamous parietal epithelium it is continuous with visceral epithelium that covers the glomerular capillaries |
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the parietal and visceral epithelia are separated by what |
capsular space |
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the parietal and visceral epithelia are continuous where? |
where glomerular capillaries connect to afferent and efferent arterioles |
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the visceral epithelium consists of |
large cells called podocyes |
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podocytes have what specialized processes |
pedicels |
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what are pedicels |
complex foot like processes that wrap around specialized lamina densa of glomular capillaries |
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what are filtration slits |
narrow gaps between adjacent pedicels |
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how small do materials passing out of the blood at the glomerulus be |
small enough to fit through the filtration slits |
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describe the glomerular capillaries
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fenestrated capillaries with endothelium that contains large-diameter pores |
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how many capillaries does the lamina densa encircle |
1 or more |
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how is blood flow controlled |
mesangial cells between adjacent capillaries control the diameter and rate of capillary blood flow |
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what causes the contraction of capillaries |
angiotensin II |
