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17 Cards in this Set
- Front
- Back
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What is found w/n the medulla of the kidney?
A) renal pyramids B) the whole nephron C) the cortex D) none of the above |
A) they renal pyramids
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What is the make up of the renal pyrmaids?
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base faces renal cortex
apex is called the renal papilla & points toward center of kidney fig 26.4 |
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portions of the renal cortex that extend between renal pyramids?
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renal columns
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T/F: if nephrons are injured or become diseased, new ones can easily be formed.
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FALSE: they cannot form new ones
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Urine formed by the nephrons ultimately drains into large ducts called ________ ducts. They lead to cuplike structures called __________ & __________ calyces
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papillary ducts, minor & major
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Function of the JGA?
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helps regulate arterial BP & the rate of blood filtration by the kidneys
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What types of cells are in the last portion of the DCT?
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principal cells & intercalated cells?
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Function of principal cells?
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respond to ADH & aldosterone
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Function of intercalated cells?
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secrete H & thereby rid the body of excess acids
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What are some substances that are secreted?
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H ions, K, ammonium, creatinine, & drugs like penicillin
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secretion of H ions occurs where in the tubules?
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PCT & collecting ducts
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in the PCT, secretion of H is linked to what?
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Na reabsorption d/t the antiporter
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How does the secretion of H ions work in the collecting ducts?
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intercalated cells secrete H by primary active transport in w/c the H pump itself uses ATP
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What transpoters are found in the collecting ducts?
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1) primary transport of H to the luminal side via ATP
2) HCO3/Cl antiporter that allows bicarb to be reabsorbed |
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Secretion of K is controlled by 3 ways, what are they?
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1) when aldosterone in the blood rises, more K is secreted in the tubules
2) whe plasma K [ ] is high, secretion of K increases 3) high level of Na in DCT increases the reabsorption of Na & K secretion. |
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where does urea come from?
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the liver converts much of the ammonia that is a waste products of aa into urea
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This product measures the nitrogen in blood that is part of urea w/c results from the catabolism of aa.
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BUN
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