Select the correct statement about the ureters.

• The ureter is innervated by parasympathetic nerve endings only.
• Ureters contain sphincters at the entrance to the bladder to prevent the backflow of urine.
• The epithelium is stratified squamous like the skin, which allows a great deal of stretch.
• The ureters are capable of peristalsis like that of the gastrointestinal tract.