Answer false topic plasma membrane 29 diffusion and

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Answer: FALSE Topic: PLASMA MEMBRANE 29) Diffusion and osmosis are passive processes that occur primarily due to the kinetic energy of molecules. Answer: TRUE Topic: PLASMA MEMBRANE 30) All cells of the body have at least one nucleus. Answer: FALSE Topic: NUCLEUS 32) Lysosomes contain enzymes that digest the contents of phagocytic vesicles, pinocytic vesicles, and endosomes. Answer: TRUE Topic: ORGANELLES 33) Microtubules of the cytoskeleton are formed from the protein actin. Answer: FALSE Topic: ORGANELLES 34) The kinetochore is part of the mitotic spindle. Answer: FALSE Topic: SOMATIC CELL DIVISION 35) The mitotic spindle consists of microtubules. Answer: TRUE Topic: SOMATIC CELL DIVISION 36) Bonding of glucose to proteins in tissues contributes to the stiffening and loss of elasticity that occurs with age. Answer: TRUE Topic: AGING AND CELLS 37) A neoplasm is an example of cell division gone wild. Answer: TRUE Topic: APPLICATIONS TO HEALTH 39) Integral proteins play important roles in certain transport mechanisms. What roles do they play in osmosis, facilitated diffusion, and active transport? Answer: Osmosis: Integral proteins form channels through which water molecules travel. Facilitated diffusion: Integral proteins function as transporters by altering the solubility and shape of the molecules being transported. 8
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Active transport: Integral proteins form channels and, in addition, provide a site for interaction with ATP, the source of energy for the process. Topic: PLASMA MEMBRANE 40) List and define: A) four passive processes and B) three active processes that accomplish the movement of substances across cell membranes. Give an example of a molecule that is moved by each process. Answer: Refer to Table 2.1 Topic: PLASMA MEMBRANE 42) Define the following types of cancer: carcinoma, sarcoma, leukemia, lymphoma. Answer: Carcinoma is the most common human cancer, and consists of tumors that arise from epithelial cells. Sarcoma is a term applied to any cancer arising from muscle cells or connective tissues. Leukemia is a cancer of the blood-forming tissue, resulting in the rapid production of abnormal leukocytes. Lymphoma is cancer of lymphatic tissue, e.g. lymph nodes. Topic: APPLICATIONS TO HEALTH 43) Define and differentiate the following terms: anaplasia, dysplasia, neoplasia, hyperplasia, hypertrophy, metaplasia. Answer: See p. 51. Topic: KEY MEDICAL TERMS ASSOCIATED WITH CELLS 44) Microfilaments of the cytoskeleton are often anchored in place through attachment to _____ of the plasma membrane. Answer: peripheral proteins Topic: PLASMA MEMBRANE 46) In the process of _____, transport of glucose often involves integral protein transporters. Answer: facilitated diffusion Topic: PLASMA MEMBRANE 47) Water travels continuously between interstitial fluid and intracellular fluid via the process of _____. Answer: osmosis Topic: PLASMA MEMBRANE 51) The process in which lysosomes digest their host cell is _____. Answer: autolysis Topic: ORGANELLES 54) _____ microtubules shorten and pull chromosomes during anaphase. Answer: kinetochore Topic: SOMATIC CELL DIVISION 56) The growth of new blood vessels often associated with tumor development is called _____. Answer: angiogenesis Topic: APPLICATIONS TO HEALTH 9
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57) Column 1: diffusion Column 2: oxygen moves from air sacs of lungs into blood of surrounding capillaries Answer: oxygen moves from air sacs of lungs into blood of surrounding capillaries Topic: PLASMA MEMBRANE 58) Column 1: diffusion Column 2: carbon dioxide moves from cells into the blood of nearby capillaries
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