How does urine move 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)by the bladder emptying and creating a negative pressure that pulls the urine to the bladder

Question

Quizplus · Accepted Answer

Urine moves from the kidneys to the urinary bladder through the ureters by peristaltic contraction of the smooth muscle of the ureters. The ureters are lined with smooth muscle that contracts to propel urine towards the bladder in a wave-like motion called peristalsis. This process is similar to how food moves through the digestive tract. Active transport and gravity are not significant factors in the movement of urine through the ureters. Although a negative pressure is created when the bladder empties, this does not contribute significantly to the movement of urine through the ureters.

How Does Urine Move from the Kidneys to the Urinary