Question

Peristaltic contractions, beginning at the renal pelvis, sweep along the ureter, forcing urine toward the urinary bladder. In a normal, healthy person, how often do these contractions occur?

A) once every minute
B) every 2 minutes
C) 12-15 times a minute
D) every 30 seconds or so
E) it is not know how often these contractions occur

Answer 1

Peristaltic contractions in a normal, healthy person occur every 30 seconds or so, starting at the renal pelvis and moving along the ureter to force urine towards the urinary bladder.

Step-by-step explanation:

In a normal, healthy person, peristaltic contractions occur every 30 seconds or so. These contractions start at the renal pelvis and move along the ureter, pushing urine towards the urinary bladder. Peristalsis is a rapid, involuntary, wave-like contraction of smooth muscles that propel urine through the urinary tract.