45 Questions
What is the characteristic of epithelial cells in terms of shape?
They have a variable shape (squamous, cuboidal, columnar)
What is the function of the basement membrane in epithelial tissue?
It forms a barrier between epithelial and connective tissue
Which of the following is a characteristic of simple epithelia?
They show polarity with uneven distribution of organelles and membrane proteins
What is the term for the region of the cell that contacts the connective tissue?
Basal pole
What is the term for the connective tissue that underlies the epithelia lining the organs of the digestive, respiratory, and urinary systems?
Lamina propria
Which of the following is NOT a characteristic of epithelial tissue?
It contains blood vessels
What is the function of cellular junctions in epithelial tissue?
They adhere epithelial cells strongly to one another
What is the function of papillae in epithelial tissue?
To increase the area of contact between the epithelium and connective tissue
What is the primary function of the epidermis?
Protection of the underlying tissue
What type of epithelial tissue is involved in secretion?
Glands
What is the origin of epithelial tissues?
From all the embryonic layers
What is the function of the basement membrane?
To separate the epithelium from the underlying tissue
What is the composition of the basement membrane proper?
Glycoproteins and collagen material
What is the cell coat composed of?
Glycoproteins and glycolipids
What is the name of the layer that is rich in reticular fibers?
Connective tissue layer
What is the primary function of glandular epithelium?
Secretion
Exocrine glands are characterized by:
Retaining their connection with the surface through ducts
What type of glands secrete hormones directly into the blood capillaries?
Endocrine glands
What is the characteristic of merocrine glands?
The secretion leaves the cell by exocytosis and the cell membrane is left intact
What is the characteristic of holocrine glands?
The cells become totally included in the secretion
What type of gland is the pancreas?
Mixed exocrine and endocrine gland
What is the classification of glands based on the shape of the secretory part and the branching of ducts?
Simple, simple branched, and compound
What is the characteristic of apocrine glands?
Loss of the apical part of the cell during secretion
What is the characteristic of sebaceous glands?
They are holocrine glands
What is the classification of glands based on the number of cells?
Unicellular and multicellular glands
What is the function of sustentacular cells in neuroepithelium?
To support neuroepithelial cells
Which of the following is an example of a compound tubular gland?
Lacrimal gland
What is the characteristic of serous glands?
They secrete serous fluid containing water, albumin, and enzymes
What is the function of the organ of Corti in the inner ear?
To perceive hearing
What is the characteristic of myoepithelial cells?
They are modified to contract
What is the main function of glandular epithelium?
Secretion of substances
Which type of gland retains its connection with the surface by having ducts?
Exocrine gland
What is the characteristic of merocrine glands?
The secretion leaves the cell by exocytosis and the cell membrane is left intact
Which gland is an example of a mixed exocrine and endocrine gland?
Pancreas
What is the term for glands that lose their connection with the surface?
Endocrine glands
Which type of gland is formed of only one cell?
Unicellular gland
What happens during the secretion of apocrine glands?
There is loss of the apical part of the cell
What type of glands are characterized by cells bursting and becoming totally included in the secretion?
Holocrine glands
What shapes can the secretory part of simple glands take?
Straight tubular, coiled tubular, and acinar
Which type of glands secrete serous fluid containing water, albumin, and enzymes?
Serous glands
What is the term for the type of epithelial cells that are modified to contract?
Myoepithelium
What is the function of the neuroepithelium?
Perception of external stimuli
Which type of glands have a secretory part that is branched and tubular?
Simple branched glands
What is the name of the glands that secrete mucin?
Mucous glands
Which type of glands have a secretory part that is branched and tubulo-acinar?
Compound tubulo-acinar glands
Learn about the features of epithelial cells, including their shapes, functions, and formation of cellular sheets that line organs and cover the body surface. Test your knowledge of this fundamental tissue type in the human body.
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