WGU D115 patho-Unit 6 renal and urologic systems Questions & Answers 100% Correct!!

Autoregulation of renal blood flow - ANSWERprevents large changes in GFR when there are increases/decreases in BP; regulated neural and hormonal regulation renin-angiotensin-aldosterone system - ANSWER-decreased blood pressure causes the juxtaglomerular cells of kidneys to secrete renin which converts angiotensinogen (inactive) to angiotensin I (active) which is then converted into angiotensin II by angiotensin-converting enzyme (ACE) -Angiotensin II stimulates the adrenal cortex to secrete aldosterone - leads to absorption of Na and increased blood pressure -once blood pressure is restored, there is a decreased drive to stimulate renin release glomerular filtration - ANSWERthe movement of fluid and dilutes across glomerular capillary membrane into the Bowman space tubular reabsorption - ANSWERMovement of fluids and solutes from tubular lumen to the peritubular capillary plasma tubular secretion - ANSWERTransfer of substances from the plasma of the peritubular to the tubular lumen, active and passive transport Excretion - ANSWERElimination of a substance in the final urine Aging and Renal System - ANSWERDecrease: size of kidney, renal blood flow, GFR, number and size of nephrons Increase: glucose in urine, urgency, frequency, nocturia Kidneys are less able to adapt to system changes Creatinine - ANSWERSubstance produced by muscle, is measured in plasma and urine to calculate a commonly used clinical estimate of GFR blood urea nitrogen (BUN) - ANSWERblood test that measures the amount of urea in the blood. An increased BUN detects an abnormality in renal function. BUN is also an indicator of hydration status Commo