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Which of the following epithelial tissue locations is NOT correctly matched to its function? |
skin: absorptionThe keratinized stratified squamous epithelium of skin is designed for protection, not absorption from the external environment. |
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Which of the following increases the surface area of certain epithelial tissues? |
microvilli Microvilli are small finger-like projections that greatly increase the surface area of epithelial cells (thus epithelial tissues), an important attribute of tissues that have a role in absorption and secretion. |
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Which of the following is a property of epithelial tissue? |
Epithelial tissue is innervated. Epithelial tissue is an innervated, avascular tissue that exhibits polarity. Epithelial tissue is also highly regenerative. |
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Which of the following statements is INCORRECT? |
Simple cuboidal epithelia are found in areas that stretch.This is incorrect; transitional (not simple cuboidal) epithelia are found in areas that stretch, in particular the ureters and urinary bladder. Simple cuboidal epithelia are designed for absorption and secretion (not stretching). |
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Where is transitional epithelium found? |
in areas subjected to stretching Transitional epithelium is found in the urinary system. It lines the ureters, bladder and proximal part of the urethra-organs that are subjected to distention or stretching as urine passes through or fills them. |
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Exocrine glands ________. |
secrete substances onto body surfacesExocrine glands use ducts to secrete substances into the external environment (onto the surfaces of the cutaneous and mucous membranes). Note: "exo" means outside. Endocrine glands are ductless; they secrete hormones into the extracellular fluid of our internal environment. Note: "endo" means inside. |
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Which of the following describes a holocrine gland? |
Holocrine glands secrete their products by rupturing. Holocrine glands secrete their products by rupturing. Sebaceous (oil) glands are the only example of holocrine glands in the body |
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Mucous cells are ________. |
unicellular exocrine glands Mucous cells are unicellular exocrine glands that secrete mucin, a protein that combines with water to form mucus. |
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________ is a water-soluble, complex glycoprotein that is secreted by goblet cells. |
MucinLike mucous cells, goblet cells are unicellular exocrine glands that secrete mucin, a protein that combines with water to form mucus. In goblet cells, the cuplike accumulation of mucin distends the top of the cell, making these cells look like a glass with a stem, thus "goblet" cell. This distortion does not occur in mucous cells. |
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Connective tissues ________. |
primarily consist of extracellular matrix All other primary tissues are composed mainly of cells, but connective tissues are largely nonliving extracellular matrix, which separates, often widely, the living cells of the tissue. |
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In connective tissue, the role of collagen fibers is to ________. |
provide tensile strengthCollagen fibers are extremely tough and provide high tensile strength (that is, the ability to resist being pulled apart) to the matrix. Stress tests show that collagen fibers are stronger than steel fibers of the same size! |
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Which tissue is correctly paired with its primary cell type? |
bone: osteoblast Osteoblasts/cytes are the primary cell type for bone. |
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Which of the following is NOT a role of connective tissue? |
absorption Absorption, the movement of substances into the body, is a role of epithelial tissue. Roles of connective tissue include: binding and support, protection, insulation, and transportation of substances, via blood, within the body. |
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________ are highly phagocytic cells that are a part of the body’s defense system. These cells can be localized (fixed), or they can wander throughout the body. |
Macrophages, which are peppered throughout loose connective tissue, bone marrow, and lymphatic tissue, may be attached to connective tissue fibers (fixed) or may migrate freely through the matrix. They phagocytize a broad variety of foreign materials, ranging from foreign molecules to entire bacteria to dust particles. These "big eaters" also dispose of dead tissue cells, and they are central actors in the immune system. |
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Select the TRUE statement. |
dense connective tissue is often called fibrous connective tissue. |
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________ is the tissue that regulates and controls body functions. |
Nervous tissue regulates and controls body functions |
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Smooth muscle ________. |
Smooth and cardiac muscle are under involuntary control. Skeletal muscle is under voluntary control. |
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Which of the following statements is INCORRECT? |
The cutaneous membrane is made of a simple columnar epithelium The cutaneous membrane, a "dry" membrane exposed to air, consists of a keratinized, stratified squamous epithelium called, the epidermis, and an underlying layer of connective tissue called, the dermis. |
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The correct order of events in tissue repair, from first to last, is ________. |
In order, the basic steps of tissue repair are: inflammation, organization, and regeneration. |
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All epithelia have two surfaces, an apical surface and a basal surface, that differ in both structure and function. |
True All epithelia exhibit polarity, which is defined by the presence of an apical surface and a basal surface that differ in both structure and function. |
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The simple columnar epithelium that form absorptive cells of the digestive tract have which characteristic? |
dense microvilli |
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Pseudostratified columnar epithelium ciliated variety ________. |
lines most of the respiratory tract |
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Inability to absorb digested nutrients and secrete mucus might indicate a disorder in which tissue? |
simple columnar |
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Which of the following is true about epithelia? |
Endothelium provides a slick surface lining all hollow cardiovascular organs. |
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