Water reabsorption in the proximal convoluted tubule is considered obigatory transport because of the permanent presence of aquaporins, but water reabsoprtion in the collecting duct is considered facultative because the presense of aquaporins is under hormonal control. True False

Use this paragraph to answer the following 2 questions. To evaluate kidney function in a 45-year-old woman with type Il diabetes, you ask her to collect her urine over 24 hours. She collects 3600 ml of urine in that period. The clinical laboratory returns the following results after analysing the patient's urine and plasma samples: plasma creatinine 4 mg/dL, urine creatinine 32 mg/dL, plasma potassium 5 mmol/L, and urine potassium 10 mmol/L.

In glomeruli, the efferent arteriole is usually smaller than the afferent? True False

Filtration is always favored in the glomerular capillaries because the sum of the Starling forces that favor reabsorption is zero. O True O False

Pressure in the renal artery is 100 mm Hg and the pressure in the renal vein is 50 mm Hg. The resistance of the afferent arteriole equals 0.5 mm Hg•min/L and the resistance of the efferent arteriole equals 0.5 mm Hg•min/L. What is the pressure in the glomerulus?

During countercurrent multiplication which of the following does NOT occur Group of answer choices The ascending limb is relatively impermeable to water The filtrate leaving the ascending limb, entering the DCT has a lower osmolarity than the filtrate entering the ascending limb The descending limb actively transports sodium and chloride Water is reabsorbed at the descending limb The filtrate entering the ascending limb has a high osmolarity compared to the filtrate just entering the descending limb

You suspect a person is suffering from a central diabetes insipidus. When untreated and reasonably hydrated, their urine concentration should be . After injection of a synthetic ADH/vasopressin urine concentration should dilute; become concentrated concentrated; remain unchanged concentrated; become dilute dilute; remain unchanged