Histology Ch.4 Epithelial Tissue

The release of lipid droplets from cells is which type of secretion?

Apocrine

With a 5-year history of chronic respiratory infections, a 23-year-old, non-smoking man is referred to an otolaryngologist. A bronchial biopsy indicates altered structures in the epithelial cells. Which of the following, if altered to reduce function, is most likely involved in this patients condition?

Cilia

A 42-year-old woman of Mediterranean descent presents wiht multiple oral blisters and a few cutaneous blisters on her back and buttocks. The superficial bullae are fragile, some have unroofed to form ulcerated lesions, and there is a positive Nikolsky sign. Blood tests reveal antibodies to a subfamily of cadherins and immumohistochemical staining of a biopsy from the oral mucosa shows distribution of the antigen throughout the epithelium. In what structures is the defect that is causing this patients condition?

Desmosomes

Using immunohistochemistry a population of cells is shown to be positive for the protein connexin. From this we can infer that the cells are connected by what type of junction?

Gap Junctions

An intermediate filament protein found in the cytoplasm of most epithelial cells is which of the following?

Keratin

An individual genetically unable to synthesize normal occludin is likely to have epithelia with defective regulation in which of the following?

Material crossing the epithelium between the cells (paracellular movement)

An 11-month-old girl is referred to a pediatric gastroenterology clinic due to a history of generalized weakness, slow growth, and refractory diarrhea. For the past month she has been hospitalized regularly to receive parenteral nutrition. Examination of the epithelium lining her small intestine confrims that the failure to absorb nutrients is most likely due to a significant decrease in which of the following?

Microvilli

Functions of the basement membrane include which of the following?

Molecular Filtering

Exocrine glands in which the acini all produce a secretion of heavily glycosylated, hydrophilic proteins are an examply of which type of gland?

Mucous Gland

Which of the following cellular features is used in naming types of epithelia?

Number of cell layers