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BIO
BIO 669 QUIZ 6 EXAM (2025)
QUESTIONS & VERIFIED ANSWERS| GRADE
A| 100% CORRECT
Which of the following would be expected to trigger a decrease in the secretion of ADH? - ANS ✓Ingestion of a large amount of pure water Enlargement of the renal pelvis and calyces due to an upper urinary tract obstruction would best be termed a(n): - ANS ✓Hydronephrosis The nephrons best able to concentrate urine are the __________ nephrons. - ANS ✓Juxtamedullary Urine does not reflux (flow back up ) into the ureter because: - ANS ✓The lower end of the ureter compressed by the detrusor muscle during micturition An increase in renal vein and thus capillary, hydrostatic pressure is most likely to have what effect on GFR? - ANS ✓Decreased GFR
BIO
Glucose reabsorption occurs primarily in the: - ANS ✓Proximal convoluted tubule The low hydrostatic pressure, high oncotic (osmotic) pressure that allow for reabsorption of valuable substances form the filtrate are the: - ANS ✓Peritubular capillaries The biggest stimulus (driver) of renin release is: - ANS ✓Decreased Na+ concentration in the distal tubules Which of the following is a risk factor for post obstructive diuresis? - ANS ✓Hypertension Which signs and symptoms best fit nephrotic syndrome? - ANS ✓Hematuria with casts, HTN, and mild proteinuria Which of the following does not favor a large glomerular filtration rate? - ANS ✓High resistance in the afferent arterioles Vitamin D is essential for: - ANS ✓The absorption of Ca++ and phosphate from the GI tract
BIO
The intercalated cells function to: - ANS ✓Reabsorb K+ and secrete H+ Which of the following is an inhibitor of stone formation? - ANS ✓Uromodulin (Tamm Horsfall proteins) The loss of albumin in the urine will produce all of the following effects EXCEPT: - ANS ✓Reduction of mesangial cells and increase in podocytes Which of the following is a symptom of chronic renal failure? - ANS ✓Hypocalemia The creatinine clearance rate is a measure that typically is used to evaluate:
- ANS ✓The GFR The principal cells function to: - ANS ✓Reabsorb Na+ and secrete K+ The pyramids contain the collecting ducts that drain through the papilla and are collected by the: - ANS ✓Calyx (calyces) Urodilantin is a natriuretic peptide and as such has what effect on the kidneys/nephrons? - ANS ✓It enhances Na+ secretion and K+ retention
BIO
Aldosterone, upon secretion by the adrenal cortex, will have what effect on solute movement in the kidneys? - ANS ✓K+ loss in the urine, Na+ retention in the plasma What is the role of erythropoietin released by the kidney? - ANS ✓It stimulates red blood cell production in the bone marrow The renal blood flow and this GFR are kept relatively consistent by: - ANS ✓Myogenic (intrinsic) autoregulation Which of the following is NOT a consistent finding in nephrotic syndrome? - ANS ✓Hypertension and vasoconstriction Which of the following does not stimulate aldosterone release? - ANS ✓Arterial natriuretic peptide Assume that fluid enters the distal tubule with an osmolarity of 100 mOsm, and that the maximum osmolarity of medullary interstitial fluid is 1100 mOsm. As plasma ADH levels rise, the osmolarity of the urine: - ANS ✓Approaches 1100 mOsm as an upper limit
BIO
The sodium (Na+) sending cells in the distal tubules are the: - ANS ✓Macula densa The countercurrent exchange of the vasa texts only works properly if: - ANS ✓The flow rate is slow The osmolarity of tubular fluid increases as it flows through the descending loop of Henle because: - ANS ✓Water moves passively out of the descending limb A patient presents with flank pain an anuria followed by poly iris after undergoing catheterization of the ureters. What is most likely the cause of this condition? - ANS ✓Post renal acute failure
