If the following hypothetical conditions exist in the nephron, calculate the net filtration pressure. glomerular capillary pressure = 80 mmHg blood colloid osmotic pressure = 20 mmHg capsular hydrostatic pressure = 10 mmHg
A. 110 mmHg
B. 90 mmHg
C. 50 mmHg
D. 30 mmHg
E. 20 mmHg
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Question 2) Which of the following events would increase filtration pressure?
A. increase in capsular pressure
B. constriction of the efferent arteriole
C. increase in colloid osmotic pressure
D. decrease in renal blood flow
E. dilation of the efferent arteriole
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Question 3) Which of the following pressures tends to force fluid from the glomerulus through the filtration membrane into Bowman's capsule?
A. tubular pressure
B. capsular pressure
C. colloid osmotic pressure
D. glomerular capillary pressure
E. None of these choices is correct.
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Question 4) Plasma contains a much greater concentration of _____ than the glomerular filtrate.
A. urea
B. water
C. protein
D. sodium ions
E. glucose
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Question 5) What percent of filtrate becomes urine?
A. less than 1
B. 5
C. 10
D. 80
E. 90
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Question 6) Passage of proteins into Bowman's capsule is prevented by
A. the size of the capillary pores.
B. the size of the filtration slits in the podocytes.
C. the size of the proteins.
D. filtration pressure.
E. the size of the capillary pores, the size of the filtration slits in the podocytes, and the size of the proteins.
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Question 7) In glomerulonephritis, the permeability of the filtration membrane increases allowing proteins to cross the membrane. Which of the following would you expect to observe?
A. increase in filtration volume
B. anuria - no urine production
C. necrosis of the renal corpuscle
D. low protein levels in the filtrate
E. no change in the filtrate
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Question 8) Urine formation involves
A. filtration of the plasma.
B. reabsorption from the filtrate.
C. secretion into the filtrate.
D. production of red blood cells.
E. filtration of the plasma, reabsorption from the filtrate, and the secretion into the filtrate.
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Question 9) Formation of filtrate depends on a
A. pressure gradient.
B. concentration gradient.
C. volume gradient.
D. temperature gradient.
E. osmotic gradient.
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Question 10) The active transport of substances into the filtrate is called tubular
A. filtration.
B. reabsorption.
C. secretion.
D. elimination.
E. excretion.
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