Urine flows through the ureters to the bladder as the result of
A. gravity.
B. a pressure gradient.
C. a concentration gradient.
D. peristaltic contractions.
E. osmotic gradient.
Answer: D. peristaltic contractions.
A. gravity.
B. a pressure gradient.
C. a concentration gradient.
D. peristaltic contractions.
E. osmotic gradient.
Answer: D. peristaltic contractions.