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BIO NMDCAT Sexually transmitted diseases
nmdcat.online July 16, 2026

The functional relationship between untreated pelvic inflammatory disease (PID) and ectopic pregnancy is best explained by the fact that PID causes:

A. Hyperactivity of the ciliated epithelium
B. Complete destruction of the ovaries
C. Scarring and narrowing of the fallopian tubes
✓
D. Premature shedding of the endometrium

📝 Explanation

The correct option is Scarring and narrowing of the fallopian tubes. Inflammation from PID destroys the ciliated epithelium and causes fibrotic scarring, narrowing the tubal lumen. This prevents the large fertilized egg from reaching the uterus, trapping it in the tube.

📖 Additional Information

  • Hyperactivity of the ciliated epithelium
  • Complete destruction of the ovaries
  • Scarring and narrowing of the fallopian tubes
  • Premature shedding of the endometrium

The correct option is Scarring and narrowing of the fallopian tubes. Inflammation from PID destroys the ciliated epithelium and causes fibrotic scarring, narrowing the tubal lumen. This prevents the large fertilized egg from reaching the uterus, trapping it in the tube.

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