Exam 17: Physiology of the Kidneys

Urea transport in the collecting duct is a(n)__________ process.

Diuresis is stimulated by atrial natriuretic peptide.

Epithelial cells of the proximal tubule have a lower concentration of Na+ than the filtrate.

If the urine volume formation is 2 mL/min,the concentration of urea in plasma is 0.3 mg/mL of urea,and the concentration in the urine is 7.8 mg/mL of urea,what is the urea clearance? (Give answer in proper units)

An increase in plasma osmolality will cause the secretion of ADH.

_________ is a nonsalt molecule that contributes to the hypertonicity of the interstitial fluid of the renal tubules.

Urea is transported out of the descending limb of the loop of Henle to add to the high osmolarity of the medulla.

Na⁺ moves by _____ from the filtrate into the epithelial cells of the proximal tubule.

Kidney stones may result in all the following EXCEPT

Diuretics

The kidneys provide short term adjustments to maintain body pH.

The buffers of urinary pH are ammonia and monohydrogen phosphate.

The __________ is a capillary network that produces a blood filtrate that enters the urinary tubules.

Bicarbonate must be converted to ____ to move into tubule cells to reduce blood pH.

Angiotensin-converting enzyme is mostly present in the capillaries of the

The proximal tubule and loop of Henle are subject to hormonal regulation of sodium and water.

Diabetes mellitus is a disease associated with the inadequate secretion or action of ADH.

Since water follows the reabsorption of Na⁺ in the proximal tubule,the filtrate is isomotic with the blood.

Uremia may cause

Glomerular filtration would be decreased by