p p p p p p
Chapterp1.pThepCellpaspapUnitpofpHealthpandpDisease
1 The nucleus p
, which is essential for function ands
p p p p p p p
urvival of the cell. p p p
A) is the site of protein synthesis p p p p p
B) contains the genetic code p p p
C) transforms cellular energy p p
D) initiates aerobic metabolism p p
2 Although energy is not made in mitochondria, they are knownas
p p p p p p p p p p
the power plants of the cell because they:
p p p p p p p p
A) contain RNA for protein synthesis. p p p p
B) utilize glycolysis for oxidative energy.
p p p p
C) extract energy from organic compounds.
p p p p
D) store calcium bonds for muscle contractions.
p p p p p
3 Although the basic structure of the cell plasma membrane isfor
p p p p p p p p p p
med by a lipid bilayer, most of the specific membrane functions
p p p p p p p p p p p
are carried out by:
p p p
A) bound and transmembrane proteins. p p p
B) complex, long carbohydrate chains. p p p
C) surface antigens and hormone receptors.
p p p p
D) a gating system of selective ion channels.
p p p p p p
4 To effectively relay signals, cell-to-
p p p p
cell communicationutilizes chemical messenger system
p p p p p
s that:
p
A) displace surface receptor proteins. p p p
B) accumulate within cell gap junctions. p p p p
C) bind to contractile microfilaments.
p p p
D) release secretions into extracellular fluid.
p p p p
,5 Aerobic metabolism, also known as oxidative metabolism,p
p p p p p p p
rovides energy by: p p
A) removing the phosphate bonds from ATP. p p p p p
B) combining hydrogen and oxygen to form p p p p p p
water.
C) activating pyruvate stored in the cytoplasm. p p p p p
D) breaking down glucose to form lactic acid.
p p p p p p
6 Exocytosis, the reverse of endocytosis, is important in
p p p p p p p
p into the extracellular fluid. p p p
A) Engulfing and ingesting fluid and proteins fortr p p p p p p p
ansport
B) Killing, degrading, and dissolving harmful
p p p p p
microorganisms
C) Removing cellular debris and releasings p p p p p
ynthesized substances p
D) Destruction of particles by lysosomal enzymesf p p p p p p
or secretion
p
7 The process responsible for generating and conductingmemb
p p p p p p p
rane potentials is:
p p
A) diffusion of current-carrying ions. p p p
B) millivoltage of electrical potential. p p p
C) polarization of charged particles. p p p
D) ion channel neurotransmission.
p p
8 Epithelial tissues are classified according to the shape of thecell
p p p p p p p p p p
s and the number of layers. Which of the following is a correctly
p p p p p p p p p p p p
matched description and type of epithelial tissue?
p p p p p p p
A) Simple epithelium: cells in contact with int
p p p p p p
ercellular matrix; some do not extend tosurf
p p p p p p p
ace
,B) Stratified epithelium: single layer of cells; allc
p p p p p p p
ells rest on basement membrane
p p p p
C) Glandular epithelium: arise from surface e p p p p p
pithelia and underlying connective tissue
p p p p
D) Pseudostratified epithelium: multiple layers of p p p p p
cells; deepest layer rests on basement membran
p p p p p p
e
9 Connective tissue contains fibroblasts that are responsible for:
p p p p p p p
A) providing a fibrous framework for capillaries. p p p p p
B) synthesis of collagen, elastin, and reticularf
p p p p p p
ibers.
C) forming tendons and the fascia that covers
p p p p p p p
muscles.
D) filling spaces between tissues to keep organs inp
p p p p p p p p
lace.
10 Although all muscle tissue cells have some similarities, smo
p p p p p p p p
oth muscle (also known as involuntary muscle) differsby:
p p p p p p p p
A) having dense bodies attached to actinf
p p p p p p
ilaments.
B) containing sarcomeres between Z lines and Mb p p p p p p p
ands.
C) having rapid contractions and abundant cross-
p p p p p
striations.
p
D) contracting in response to increasedi p p p p p
ntracellular calcium. p
11 Which of the following aspects of the function of the nucleusis p
p p p p p p p p p p p p
erformed by ribosomal RNA (rRNA)?
p p p p
A) Copying and carrying DNA instructions forprote p p p p p p
in synthesis p
, B) Carrying amino acids to the site of proteins
p p p p p p p p
ynthesis
C) Providing the site where protein synthesiso
p p p p p p
ccurs
D) Regulating and controlling protein synthesis
p p p p
12 Breakdown and removal of foreign substances and worn-
p p p p p p p
outcell parts are performed by which of the following organelle
p p p p p p p p p p
s?
A) Lysosomes
B) Golgi apparatus p
C) Ribosomes
D) Endoplasmic reticulum (ER) p p
13 Impairment in the function of peroxisomes would result in:
p p p p p p p p
A) inadequate sites for protein synthesis. p p p p
B) an inability to transport cellular productsa
p p p p p p
cross the cell membrane.
p p p
C) insufficient energy production within a cell.p p p p p
D) accumulation of free radicals in the cytoplasm. p p p p p p
14 After several months of trying to conceive, a couple is undergoi
p p p p p p p p p p
ng fertility testing. Semen analysis indicates that themans sper
p p p p p p p p p
m have decreased motility, a finding that is thoughtto underlie t
p p p p p p p p p p p
he couples inability to become pregnant. Which of the followin
p p p p p p p p p
g cellular components may be defective withinthe mans sperm?
p p p p p p p p p
A) Ribosomes
B) Microtubules
C) Mitochondria
D) Microfilaments