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Chapterb 1.bTheb Cellb asb ab Unitb ofb Healthb andb Disease
1 The nucleus b
, which is essential for function ands
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urvival of the cell. b b b
A) is the site of protein synthesis b b b b b
B) contains the genetic code b b b
C) transforms cellular energy b b
D) initiates aerobic metabolism b b
2 Although energy is not made in mitochondria, they are knownas t
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he power plants of the cell because they:
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A) contain RNA for protein synthesis. b b b b
B) utilize glycolysis for oxidative energy.
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C) extract energy from organic compounds.
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D) store calcium bonds for muscle contractions.
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3 Although the basic structure of the cell plasma membrane isfor
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med by a lipid bilayer, most of the specific membrane functions a
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re carried out by:
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A) bound and transmembrane proteins.
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B) complex, long carbohydrate chains. b b b
C) surface antigens and hormone receptors.
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D) a gating system of selective ion channels.
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4 To effectively relay signals, cell-to-
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cell communicationutilizes chemical messenger systems that:
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A) displace surface receptor proteins. b b b
B) accumulate within cell gap junctions. b b b b
C) bind to contractile microfilaments.
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D) release secretions into extracellular fluid.
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,5 Aerobic metabolism, also known as oxidative metabolism,pr
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ovides energy by:
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A) removing the phosphate bonds from ATP. b b b b b
B) combining hydrogen and oxygen to formw b b b b b b
ater.
C) activating pyruvate stored in the cytoplasm.b b b b b
D) breaking down glucose to form lactic acid.
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6 Exocytosis, the reverse of endocytosis, is important in
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b into the extracellular fluid. b b b
A) Engulfing and ingesting fluid and proteins for b b b b b b
transport
B) Killing, degrading, and dissolving harmful
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microorganisms
C) Removing cellular debris and releasing b b b b
synthesized substances b
D) Destruction of particles by lysosomal enzymesf b b b b b b
or secretion
b
7 The process responsible for generating and conducting
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membrane potentials is: b b
A) diffusion of current-carrying ions. b b b
B) millivoltage of electrical potential. b b b
C) polarization of charged particles. b b b
D) ion channel neurotransmission.
b b
8 Epithelial tissues are classified according to the shape of thecell
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s and the number of layers. Which of the following is a correctly
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bmatched description and type of epithelial tissue?
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A) Simple epithelium: cells in contact with inte
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rcellular matrix; some do not extend tosurfac
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e
, B) Stratified epithelium: single layer of cells; allc
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ells rest on basement membrane
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C) Glandular epithelium: arise from surface b b b b
epithelia and underlying connective tissue
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D) Pseudostratified epithelium: multiple layers of b b b b b
cells; deepest layer rests on basement membrane
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9 Connective tissue contains fibroblasts that are responsible for:
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A) providing a fibrous framework for capillaries.
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B) synthesis of collagen, elastin, and reticularfibe
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rs.
C) forming tendons and the fascia that covers
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muscles.
D) filling spaces between tissues to keep organs inpla
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ce.
10 Although all muscle tissue cells have some similarities, smoo
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th muscle (also known as involuntary muscle) differsby:
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A) having dense bodies attached to actinf
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ilaments.
B) containing sarcomeres between Z lines and Mb b b b b b b b
ands.
C) having rapid contractions and abundant cross-
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striations.
D) contracting in response to increasedintracellul b b b b b
ar calcium.
b
11 Which of the following aspects of the function of the nucleusis
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performed by ribosomal RNA (rRNA)?
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A) Copying and carrying DNA instructions forp
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rotein synthesis b