Exam 12: The Urinary System

Match the correct statement about sodium reabsorption by using the answer code (options may be used more than once or not at all): -represents 25 percent of Na⁺ reabsorbed

Which statement about juxtamedullary nephrons is INCORRECT?

What is NOT involved in autoregulation of the GFR?

Why is glucose NOT normally found in the urine?

During acidosis,H⁺ secretion increases.

Afferent arteriolar vasoconstriction _____ blood flow into the glomerulus,which causes the glomerular-capillary blood pressure to _____,leading to a(n)_____ in the net filtration pressure and a resultant _____ in the GFR.

The Tm represents the maximum amount of a particular substance that can be excreted in the urine per unit of time.

Match the chemicals below with the correct characteristic by using the answer code (options may be used more than once or not at all): -secreted by the adrenal cortex

Describe the mechanisms by which the kidney produces concentrated urine.

Contraction of mesangial cells closes off a portion of the filtering capillaries,which leads to a decrease in GFR if the filtration pressure remains unchanged.

Below is a listing of nephron components and associated structures: 1)descending limb of loop of Henle 2)Bowman's capsule 3)collecting tubule 4)ascending limb of loop of Henle 5)distal tubule 6)proximal tubule What is the correct flow of filtrate through these structures?

Indicate whether the first item in the statement increases, decreases, or has no effect on the second item by using the answer code (options may be used more than once or not at all): -Increased vasopressin secretion _____ urinary output.

A rise in ECF K⁺ concentration leads to increased excitability of heart muscle,possibly producing fatal cardiac arrhythmias.

Acute renal failure may be reversible,whereas chronic renal failure is not reversible.

Match the correct statement about sodium reabsorption by using the answer code (options may be used more than once or not at all): -important in the regulation of ECF volume

Into which structure does most reabsorption occur?

ACE inhibitor drugs promote diuresis by blocking the conversion of angiotensin I into angiotensin II.

Which of the following is true about the ascending limb of the loop of Henle?

Describe micturition in an adult and baby.

Which statement concerning the medullary vertical osmotic gradient is INCORRECT?