Q3 (Ch 4: Pt. 2) – Flashcards
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In adult humans, most cancers are carcinomas or adenocarcinomas. These include cancers of the skin, lung, colon, breast, and prostate. Which of the four basic tissue types is involved, and why? Epithelial tissue: it is exposed to the environment and is constantly dividing, both factors allowing more opportunity for damage and overcoming growth control mechanisms. Connective tissue: it is found everywhere in the body, and is the only tissue common to the skin, lungs, colon, breasts, and prostate. Connective tissue: cancerous cells require high levels of nutrients, and connective tissue is well vascularized. Epithelial tissue: it is avascular and composed entirely of cells, both of which inhibit surveillance by the immune system. Connective tissue: cancerous cells can move more freely and spread to other tissues more easily due to the high level of vascularization in connective tissue.
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Epithelial tissue: it is exposed to the environment and is constantly dividing, both factors allowing more opportunity for damage and overcoming growth control mechanisms.
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Select the correct statement regarding the stem cells of connective tissue. Connective tissue does not contain cells. Chondroblasts are the main cell type of connective tissue proper. Connective tissue cells are nondividing. "Blast" cells are undifferentiated, actively dividing cells.
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"Blast" cells are undifferentiated, actively dividing cells.
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Skin, lung, and blood vessel walls have which tissue characteristic in common?
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elastic fibers
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Elastic connective tissue is found in the walls of the large arteries that leave the heart.
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True
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Which tissue type is formed by many cells joining together, each contributing a nucleus?
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skeletal muscle
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Without macrophages, wound healing is delayed. Why?
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Macrophages phagocytose many foreign materials, as well as cell debris and dead cells. This cleans the wound, allowing granulation tissue to form.
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Select the correct statement regarding tissue repair. Granulation tissue is highly susceptible to infection. Inflammation causes capillaries to dilate and become permeable. Granulation tissue is another name for a blood clot. The clot is formed from dried blood and transposed collagen fibers.
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Inflammation causes capillaries to dilate and become permeable.
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Which of the following is NOT a step in tissue repair? regeneration and fibrosis inflammation formation of new stem cells restoration of blood supply
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formation of new stem cells
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Which of the following is a dry membrane exposed to the air? mucous membrane synovial membrane cutaneous membrane serous membrane
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cutaneous membrane
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Nervous tissue consists mainly of neurons and collagen fibers.
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False
