Flashcards in March 20, 2015 --> Kidneys, pH (151-159, 176-181) Deck (11):
What do Inulin and PAH measure?
Inulin: Measures glomerular filtration rate
PAH: used to estimate renal plasma flow
Other than Inulin, what two other substances can also be used to determine GFR?
Blood urea nitrogen and Serum creatinine
T or F, Inulin undergoes tubular secretion and reabsorption so that it can more accurately measure GFR
False, Does not undergo tubular secretion or reabsorption
The rate at which a substance is cleared from plasma = ?
plasma volume completely cleared / unit time
T or F, PAH undergoes tubular secretion and reabsorption and is also used to measure GFR
False, it measures renal plasma flow
What are the two general classes of nephrons
What are the different roles of Cortical and Juxtamedullary nephrons
Cortical: Mainly perform excretory and regulatory functions
Juxtamedullary: Concentrate and dilute urine
Much of the ion transport taking place in the distal convoluted tubule is regulated by what?
The endocrine system (parathyroid hormone and aldosterone have different roles)
Explain how Parathyroid hormone and Aldosterone have differing roles in the regulation of ion transport in the distal convoluted tubule
Parathyroid hormone --> distal conv. tubule reabsorbs more calcium and excretes more phosphate
Aldosterone --> distal conv. tubule reabsorbs more sodium and excretes more potassium
T or F, the descending limb is permeable to water but completely impermeable to salt