In activity 2, students were instructed to close the valve between the collecting duct and the urinary bladder. This simulates a medical condition of a tumor obstructing renal tubule.
The function of a one way valve between the collecting duct and urinary bladder includes limiting the movement of filtrate into the urinary bladder, thus, expanding volume as well as pressure in the renal tubule.
The filtrate pressure within the Bowman's capsule stayed the same excepting that the source beaker was increased i.e. blood pressure from general circulation, whereas, the glomerular filtration rate declined when the one way valve between the collecting duct and the urinary bladder was closed during the activity.
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