Urine moves from the kidneys to the urinary bladder through the ureters
a. by active transport.
b. passively by the force of gravity.
c. by peristaltic contraction of the smooth muscle of the ureters.
d. when the bladder empties and creates a negative pressure that pulls the urine to the bladder.
e. none of these answers.
C
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a. true b. false
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