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BME 235 Quiz 11.3 questions with 100- correct answers(100- accuracy).
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BME 235 Quiz 11.3 questions with 100- correct answers(100- accuracy).
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BME 235 Quiz 11.3 questions with100% correct answers(100%
accuracy)
Kidney - answer eliminates metabolic wastes
prevents excessive water loss
Collecting ducts - answer - cortical portion
- receives tubular fluid from several nepherons
- medullary portion
more permeable to water than to NaCl
surrounds medulla extracellular fluid is increasingly salty
as urine passes through CD H2O is drawn out by osmosis
- Urine becomes more concentrated
Dehydration - answer - Leads to production of hypertonic urine
- high blood osmolarity stimulates posterior pituitary to release
antidiuretic hormone (ADH)--> increases synthesis of aquaporin channels
- collecting duct becomes more permeable to H2O
- urine is more concentrated
Water diuresis - answer drinking large volumes of water will produce
hypotonic urine
- CD reabsorbs NaCl but remains impermeable to water
- Urine concentration remains low
The ability to concentrate urine depends in salinity gradient in renal
medulla - answer - meduallly ECF four times saltier than cortex
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