Ch 4 Homework
Which of the following is true about epithelia? Stratified epithelia are associated with filtration. Pseudostratified epithelia are commonly keratinized. Simple epithelia are commonly found in areas of high abrasion. Endothelium provides a slick surface lining all hollow cardiovascular organs.
Endothelium provides a slick surface lining all hollow cardiovascular organs.
Which of the following is a property of epithelial tissue? Epithelial tissue is innervated. Epithelial tissue does not exhibit polarity. Epithelial tissue is typically unable to regenerate. Epithelial tissue contains blood vessels.
Epithelial tissue is innervated. Epithelial tissue is an innervated, avascular tissue that exhibits polarity. Epithelial tissue is also highly regenerative.
Which of the following describes a holocrine gland? Holocrine glands secrete their products by rupturing. Holocrine glands secrete their products by exocytosis. Holocrine glands secrete their products by endocytosis. Holocrine glands secrete their products by pinching off the apex of the cell.
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
The correct order of events in tissue repair, from first to last, is ________. organization, inflammation, and regeneration inflammation, regeneration, and organization regeneration, organization, and inflammation inflammation, organization, and regeneration
In order, the basic steps of tissue repair are: inflammation, organization, and regeneration.
________ 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. Eosinophils Macrophages Basophils Erythrocytes (RBC) Mast cells
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.
________ is a water-soluble, complex glycoprotein that is secreted by goblet cells. A hormone Mucin Salt An enzyme An amino acid
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.
________ is the tissue that regulates and controls body functions. Nervous tissue Bone Muscle tissue Blood
Nervous tissue regulates and controls body functions
Which of the following statements is INCORRECT? Stratified squamous epithelia are found in areas subjected to wear and tear. Simple cuboidal epithelia are found in areas that stretch. Simple columnar epithelia are associated with absorption and secretion. Simple squamous epithelia are associated with filtration and exchange.
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).
Smooth muscle ________. has striations is under involuntary control has long, cylindrical cells contains intercalated discs
Smooth and cardiac muscle are under involuntary control. Skeletal muscle is under voluntary control.
Which of the following statements is INCORRECT? Mucous membranes line exits and entrances to the body. The cutaneous membrane is a dry membrane exposed to air. Serous membranes line body cavities and organs. The cutaneous membrane is made of a simple columnar epithelium
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.
All epithelia have two surfaces, an apical surface and a basal surface, that differ in both structure and function. True False
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.
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.
Which tissue is correctly paired with its primary cell type? bone: fibrocyte bone: osteoblast connective tissue proper: chondroblast cartilage: fibroblast
bone: osteoblast Osteoblasts/cytes are the primary cell type for bone.
Select the TRUE statement. Bundles of collagen are often found in loose connective tissue. Loose connective tissue includes cartilage. Dense connective tissue includes adipose tissue. Dense connective tissue is often called fibrous connective tissue
dense connective tissue is often called fibrous connective tissue.
The simple columnar epithelium that form absorptive cells of the digestive tract have which characteristic? cilia fibroblasts a rich vascular supply dense microvilli
dense microvilli
Where is transitional epithelium found? in areas subject to wear and tear in areas involved in absorption in areas involved in filtration in areas subjected to stretching
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.
Pseudostratified columnar epithelium ciliated variety ________. possesses no goblet cells lines most of the respiratory tract aids in digestion is not an epithelial classification
lines most of the respiratory tract
Which of the following increases the surface area of certain epithelial tissues? desmosomes basement membrane basal lamina microvilli cilia
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.
Connective tissues ________. arise from different types of embryonic tissue; therefore, they have little relationship or kinship to one another are all avascular primarily consist of extracellular matrix are delicate tissues, not designed to bear weight or withstand abrasion or tension
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.
In connective tissue, the role of collagen fibers is to ________. form delicate networks around blood vessels and support the soft tissue of organs provide elasticity retain fluid provide tensile strength
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!
Exocrine glands ________. secrete substances into blood secrete hormones secrete substances onto body surfaces are only unicellular in structure
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.
Inability to absorb digested nutrients and secrete mucus might indicate a disorder in which tissue? simple squamous transitional stratified squamous simple columnar
simple columnar
Which of the following epithelial tissue locations is NOT correctly matched to its function? kidney: secretion skin: absorption kidney: filtration digestive tract: absorption skin: protection
skin: absorptionThe keratinized stratified squamous epithelium of skin is designed for protection, not absorption from the external environment.
Mucous cells are ________. multicellular exocrine glands unicellular exocrine glands endocrine glands hormone-producing glands
unicellular exocrine glands Mucous cells are unicellular exocrine glands that secrete mucin, a protein that combines with water to form mucus.