In individuals with cystic fibrosis:A) the mucus enhances the action of the cilia that line the bronchi.B) the mucus prevents the growth of dangerous bacteria in the respiratory system.C) the mucus in the respiratory system is thinner than in unaffected individuals.D) abnormal mucous secretions occur throughout the body systems.E) abnormal mucous secretions inhibit infections by bacteria.

Question

In individuals with cystic fibrosis:A)  the mucus enhances the action of the cilia that line the bronchi.B)  the mucus prevents the growth of dangerous bacteria in the respiratory system.C)  the mucus in the respiratory system is thinner than in unaffected individuals.D)  abnormal mucous secretions occur throughout the body systems.E)  abnormal mucous secretions inhibit infections by bacteria.

JaMarcus Toomer · Accepted Answer

Final Answer : D, Explanation :  In individuals with cystic fibrosis, the gene that codes for a protein that regulates the movement of salt in and out of cells is mutated. This leads to thick, sticky mucus production throughout the body, including the lungs, pancreas, liver, intestines, sinuses, and sex organs. This abnormal mucous secretion is a hallmark of the disease, affecting various body systems, not just the respiratory system. The mucus does not enhance cilia action, prevent bacterial growth, or inhibit infections; in fact, it can obstruct airways, trap bacteria leading to infections, and cause complications in other organs.

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