Both cystic fibrosis and chronic bronchitis cause cells of the respiratory system to hypersecrete mucus. the excessive mucus makes gas exchange more difficult and allows bacteria to thrive, often causing secondary infections. what type(s) of cells in the lungs are responsible for extra mucus production?

Goblet cells

There are two main areas in the lungs that secrete mucus. From the trachea to the major bronchi ciliated cells and goblet cells are present in the epithelium cells. The surface of the epithelium cells are coated by a mucus layer of viscos elastic gel which acts as a protective barrier and is mobilized by ciliary movement. Mucins are secreted by goblin cells are a major component of the mucus. Mucus is composed of water carbohydrates proteins and lipids

i would go with b

cytokinesis occurs after telophase so that eliminates d

and the entire reason for cytokinesis is for cellular reproduction