Which feature of the ureter helps prevent urine from flowing back into the kidneys?
Correct answer: B. The ureter enters the bladder obliquely
- A. The ureter contains a wide internal lumen
- B. The ureter enters the bladder obliquely
- C. The ureter has a continuous external sphincter
- D. The ureter is lined by simple squamous epithelium
Explanation
The ureter passes obliquely through the bladder wall, so bladder pressure compresses it during filling and urination. The ureter is lined mainly by transitional epithelium, not simple squamous epithelium.
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About Urinary System
The urinary system includes the kidneys, ureters, urinary bladder and urethra, with emphasis on nephron structure and urine formation. It explains glomerular filtration, tubular reabsorption, tubular secretion, water and electrolyte regulation, acid base balance, and the roles of ADH and aldosterone in maintaining homeostasis.
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