Term
Simple squamous epithelium is found in all of the following EXCEPT:
(A)lung
(B)kidney
(C)skin
(D)blood vessel |
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Definition
| The epidermis of skin is composed of stratified squamous epithelium. |
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Term
The adult tissue that can generate the most mechanical force by contraction is:
(A)epithelium
(B)nervous tissue
(C)connective tissue
(D)muscle |
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Definition
| Muscle tissue is specialized for contraction. Cells in some epithelia and some connective tissue may also contract, but generate much less force at the tissue level. |
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Term
The adult tissue responsible for contraction during the heartbeat is:
(A)epithelium
(B)connective tissue
(C)nervous tissue
(D)muscle |
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Definition
| Cardiac muscle contracts to produce the heartbeat, and modified carduac muscle cells in the pacemaker region (sino-atrial node) initiate the contraction. Nervous tissue in the sympathetic and parasympathetic branches of the nervous system may modify the rate of the heartbeat but cannnot initiate it. |
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Term
The adult tissue that forms the most glands is:
(A)epithelium
(B)connective tissue
(C)nervous tissue
(D)muscle |
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Definition
| All exocrine glands are composed of epithelial tissues, as are some endocrine tissues. Some endocrine structures are modified nervous tissue structures such as the posterior pituitary and pineal. |
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Term
The adult tissue that supports the shape of the human body is:
(A)epithelium
(B)nervous tissue
(C)blood
(D)connective tissue |
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Definition
| Connective tissue in the form of bone and cartilage forms most of the skeleton, whch suppots the overall shape of the human body, and fibrous connective tissues in the walls of organs support the shapes of the organs within the body. |
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Term
The adult tssue whose mechanical properties are due to the extracellular materal in the tissue is:
(A)epithelium
(B)connective tissue
(C)nervous tissue
(D)muscle |
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Definition
| Mechanical properties of connective tissues are almost totally due to the extracellular matrix. Mechanical properties of epithelia, muscle tissues and nervous tissues are primarily due to cytoskeletal components inside the cells in the tissues. |
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Term
| The adult tissue that is capable of rapid transmission of signals among parts of the human body is: |
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Definition
| Nervous tissue is responsible for transmitting rapid signals among body parts. Muscle tissue be it cardiac or smooth may transmit rapid signals over smaller dstances, and epithelial tissue in endocrine glands can transmit somewhat slower signals over long distances within the body. |
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Term
Which of the following cells are multipotent and can dfferentiate into other types of cells:
(A)fibroblasts
(B)chondroblasts
(C)adipocytes
(D)mesenchymal cells |
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Definition
| Mesenchymal cells are undifferentiated connective tissue cells that have the potential to differentiate into other types of connective tissue cells. They are primarily found in embryonic and fetal tissues; some are thought to be present in the adult, abutting the walls of capillaries. They are smaller than fibroblasts and are stellate in shape, They are capable of moving by extending their cell processes nto the gel-like substance. |
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Term
Ground substance found in connective tissue is composed of all the following EXCEPT:
(A) chondroitin sulfate
(B)hyaluronic acid
(C)actinomyosin
(D)mucopolysaccharides |
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Definition
| Ground substance is located between the cels and fibers, both of which are embedded in it. It forms an amorphous intercellular material. In the fresh state, it appears as a transparent and homogenous gel. It acts as a route for the passage of nutrients and wastes to and from the cells within or adjacent to the connective tissue. The ground substance is composed of mucopolysacchardes, proteins, lipids, and water. The primary glycosaminoglycans found in the ground substance are chondroitin sulfate and hyaluronic acid; the latter is present in great quantity. |
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Term
The function of the mast cells is related to:
(A)secretion of immunoglobulins
(B)phagocytic activity
(C)allergic response of the body
(D)secretion and storage of coagulents |
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Definition
| The mast cell granules contain histamine and an anticoagulant known as heparin. Histamine dilates blood vessels and increases the permeability of capillaries, thus increasing interstitial fluid. Mast cells take part in the allergic response of the body. Mast cells are fond in most connective tissue and are numerous in the respiratory tract and near small blood vessels. Plasma cells are found in the lamina propria of the gastrointestinal tract. They function in protecting the body against bacterual invasion by secreting antibodies into the circulating blood. |
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Term
Which of the following is NOT considered a basic tissue that makes up the human body?
(A)epithelium
(B)connective tissue
(C)bone
(D)muscle |
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Definition
| The four basic tissues that compose the human body are epithelium, connective tissue, nervous tissue and muscle. Bone is a member of the connective tissues. |
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Term
Epithelial cells may have specializations at the cell surface such as:
(A)microvilli
(B)cilia and stereocilia
(C)flagella
(D)all of the above |
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Definition
| Epithelial cell specializations at the cell surface may include microvilli, cilia and stereocilia and flagella. |
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Term
Epithelial tissue:
(A)is derived from all three germ layers
(B)is avascular
(C)les on a connective tissue layer-the basal lamina
(D)is characterized by all the above |
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Definition
| Besides the four characteristics listed, epithelial tissue has compactly aggregated cells, and has cells that form sheets and are polarized. |
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Term
A group of cells subserving the same general function and bound together or united by varying amnounts of intercellular substance and tissue fluids is called:
(A)organ
(B)tissue
(C)system
(D)organ system |
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Definition
| A tissue consists of a group of cells performing a similar funtion. The cells are embedded in intercellular substances and tissue fluids. Four basic tissues compose the human body; epithelium, connective, nervous and muscle. The four can be organized to form functional units known as organs. |
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Term
Epithelial tissues may be characterized by:
(A)protection
(B)secretion
(C)absorption
(D)all of the above |
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Definition
| Epithelium is a group of cells forming a tissue. Epithelium lines the gut, the respiratory system ad the genitourinary system, and forms the epidermis. It therefore protects, secretes and absorbs. |
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Term
The outstanding feature of connective tissue include:
(A)an orderly arrangement of cells into sheets
(B)possessing a faily large amount of intercelluar material
(C)making up the majority of the ducts of the secretory organs
(D)all of the above |
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Definition
| Connective tissue, cartilage, and bone are basically supporting tissues. An abundance of nonliving formed substance is the feature that is common to the groups as a whole. Cells are interspersed in the intercellular substance, and fibers are a constituent of the formed substance. Fibers and ground substance are called matrix. |
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Term
The adult tissue that lines the lumen of the human digestive and respiratory passageways is:
(A)epithelium
(B)nervous tissue
(C)blood
(D)connective tissue |
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Definition
| Epithelial tissue lines most naturally occuring spaces in the human body, including the spaces in the the digestive and respiratory systems |
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Term
The adult tissue that covers the surface of the human body is:
(A)epithelium
(B)nervous tissue
(C)blood
(D)connective tissue |
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Definition
| Epithelial tissue (the stratified squamous epithelium of the epidermis) lines naturally occuring surfaces on the human body. |
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