The mechanism for the filtration of the blood within the nephron involves __________.
a. high hydrostatic pressure of blood forcing water and small molecules out of the capillary
b. the active transport of Na+ and glucose followed by osmosis
c. both active and passive secretion of ions and toxins into the tubule
d. the high osmolarity of the medulla that was created by active and passive transport of salt from the tubule and passive diffusion of urea from the collecting duct
e. a lower osmotic pressure in Bowman's capsule compared to that in the glomerulus
Answer: a. high hydrostatic pressure of blood forcing water and small molecules out of the capillary
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