PART 42) If a sbs A) urine volume will increase 0) urine volume will decrease. C

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PART 42) If a sbs A) urine volume will increase 0) urine volume will decrease. C) the concentration of the substance in the blood is unusually D) the concentration of the substance in the blood cannot increase fur E) Both A and C are correct i ma ther f aldosterone on the principal cells of the distal convoluted tubule is tor A) increase the synthesis of sodium pumps 8) increase the cells permeability to water C) increase retention of potassium ions D) increase the cells' secretion of antidiuretic hormone. E) trigger the release of renin. 44) Blood in the renal vein may have a higher concentration of bicarbonate ions than blood in the renal artery because: A) bicarbonate ions cannot pass the glomerular flter, so blood becomes more concentrated as water enters the nephrons and bicarbonate ions stay behind. B) the rate of cellular respiration is higher in the endothelium of the renal venules than in the endothelium of the renal arterioles. C) newly produced bicarbonate ions (as opposed to filtered bicarbonate iona) are added to the D) hydrogen ions must be added to venous blood to maintain pH balance, so bicarbonate ions E) large ions like bicarbonate ions are necessary in the venous blood to help maintain blood blood by the intercalated cells of the collecting ducts as they secrete hydrogen ions into the tubular fluid. are reabsorbed at the same time to maintain electrical balance colloid osmotic pressure. 45) Urine that is hypotonic to blood plasma is produced when: A) levels of aldosterone are high. B) levels of antidiuretic hormone are high. C) levels of antidiuretic hormone are low. D) plasma concentration of sodium ions is high E) levels of both aldosterone and antidiuretic hormone are high. A) glomerular (Bowman's) capsule. B) proximal convoluted tubule C) hairpin turn of the loop of Henle D) ascending limb of the loop of Henle. E) distal convoluted tubule 46) The concentration of solutes in tubular fluid is greatest in the

Explanation / Answer

Answers :

42 ) - C

If a substance has exceeded its transport maximum in the kidney tubules , it us likely that the concentration of that substance in the blood is unusually high .

43) - A

Aldosterone acts on principal cells of the distal convoluted tubule to increase the synthesis of sodium pumps .

44 ) - C

Blood in renal vein may have a higher concentration of bicarbonate ion than the blood in the renal artery because newly produced bicarbonate ion ( as opposed to filtered bicarbonate ion ) are added to the blood by the intercalated cells of the collecting ducts as they have secrete hydrogen ions into the tubular fluid .

45 ) - C

Urine that is hypotonic to blood volume is produced when the levels of anti diuretic hormone are low .

46 ) - C

The concentration of solutes in tubular fluid is greatest in the hairpin turn of the loop of henle .

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