Harry suffers from cystic fibrosis and frequently has periods where he can hardly breathe. The problem is the result of
a) inflammation of the bronchi.constriction of the trachea.
b) thick secretions that exceed the ability of the mucus elevator to transport them.
c) laryngospasms that occur in response to a toxic substance produced by the epithelial cells.
d) collapse of one or both lungs.

Explanation: In cystic fibrosis the primary defect in ion transport leads to defective mucociliary action, and accumulation of thick viscid secretions that obstruct the airways. This leads to a marked susceptibility to bacterial infections, which further damage the airways. With repeated infections there is widespread damage to airway walls, with destruction of supporting smooth muscle and elastic tissue, fibrosis, and further dilatation of bronchi. The smaller bronchioles become progressively obliterated as a result of fibrosis (bronchiolitis obliterans).

aliasger2709 aliasger2709 · Answer 2 · 2022-03-15T14:06:32+01:00

Cystic fibrosis is the disease of the lungs, kidneys and liver. It resulted because of thick secretions that overextended the ability of mucus to transport them.

What is Cystic fibrosis?

Cystic fibrosis is a disease that affects the mucus and the digestive juices of the respiratory and the digestive system of the body. The mucus and the other fluids become thick and sticky that resulting in the blockage of the ducts, tubes and other passages.

The blockage of the tracts by the mucus causes further bacterial infection and leads to the destruction of the air passages, smooth muscles, dilation of bronchi and many others.

Therefore, option b) thick secretion of the mucus resulted because of cystic fibrosis.

Learn more about cystic fibrosis here:

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