26 Questions
What is the primary function of the basement membrane in epithelial cells?
To act as a selective filtration barrier
Which of the following is NOT a characteristic of epithelial cells?
They have a direct blood supply
What is the primary function of the lamina propria in epithelial cells?
To provide support to the overlying epithelium
Which of the following proteins is NOT a component of the basal lamina?
Keratin
What is the significance of the basal lamina in the diagnosis of malignant epithelial tumors?
It allows for the diagnosis of malignant epithelial tumors by their ability to break through the basement membrane
What is the primary mechanism of nutrition for epithelial cells?
Diffusion from adjacent connective tissue
What is the characteristic of the apical pole of epithelial cells?
May contain enzymes such as disaccharidases and peptidases
What is the primary means of nutrient delivery to epithelial tissues?
Diffusion of metabolites through the basal lamina
What is the process by which epithelial cells are renewed continuously?
Mitosis
What is the term for the transformation of one type of adult epithelial tissue into another adult type?
Metaplasia
What is the characteristic of the basal surface of epithelial cells?
Receptors for chemical messengers
What is the term for the differential and stable organization of cell organelles and membrane proteins in epithelial cells?
Polarity
What is the primary function of sensory nerve endings in epithelial tissues?
Reception of sensory information
What is the characteristic of the lateral surface of epithelial cells?
No specific characteristic
What is the term for the process by which epithelial cells receive nutrients?
Nutrition
What is the characteristic of the organization of epithelial cells in endocrine glands?
Form anastomosing cords interspersed between dilated blood capillaries
What is the characteristic of the basal region of serous cells?
It has intense basophilia
What is the function of myoepithelial cells in exocrine glands?
To contract around the secretory portion of the gland
What is the characteristic of the apical pole of goblet cells?
It contains numerous large, lightly staining granules
What is the term for the ability of certain cells to take up amine precursors and exhibit amino acid decarboxylase activity?
APUD
What is the term for the system of endocrine cells interspersed among non-endocrine cells?
DNES
What is the characteristic of the secretory granules in neuroendocrine cells?
They are found in the basal region of the cell
What is the function of paracrine cells?
To regulate the function of neighboring cells
What is the characteristic of the nucleus in mucus-secreting cells?
It is located in the cell base
What is the term for the process by which secretory granules are released from the cell?
Exocytosis
What is the characteristic of the cytoplasm in myoepithelial cells?
It contains numerous actin and myosin filaments
Test your knowledge of epithelial tissue, including its structure, function, and unique features such as basement membrane attachment and cell polarity. This quiz covers the characteristics of epithelial tissue, including its lack of blood supply and specialized cell-cell junctions.
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