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6. Men with cystic fibrosis are often infertile. Sperm cannot get from the testis into the semen due to a lack of the

  • oviduct
  • vas deferens
  • testis

7. When the CFTR protein malfunctions, which two ions remain in the sweat, making it very salty?

  • Sodium and chloride
  • Sodium and calcium
  • Sodium and caesium