Test bank for understanding_pathophysiology__6th_edition_testbank

Understanding
Pathophysiology, 6th
9 9




Edition

,Chapter901:9Cellular9Biology

Huether9&9McCance:9Understanding9Pathophysiology,96th9Editio

n9MULTIPLE9CHOICE

1. A9student9is9observing9a9cell9under9the9microscope.9It9is9observed9to9have9supercoiled9DNA9wi
th9histones.9Which9of9the9following9would9also9be9observed9by9the9student?

a. A9single9circular9chromosome

b. A9nucleus

c. Free-floating9nuclear9material

d. No9organelle

s9ANS:9B

The9cell9described9is9a9eukaryotic9cell,9so9it9has9histones9and9a9supercoiled9DNA9within9its9nucleus;9thus
,9the9nucleus9should9be9observed.9A9single9circular9chromosome9called9a9prokaryote9contains9free-
floating9nuclear9material9but9has9no9organelles.



REF:9p.92



2. A9nurse9is9instructing9the9staff9about9cellular9functions.9Which9cellular9function9is9the9nur
se9describing9when9an9isolated9cell9absorbs9oxygen9and9uses9it9to9transform9nutrients9to9energy?

a. Metabolic9absorption

b. Communication

c. Secretion

d. Respiration



ANS:9D



NURSINGTB.COM



The9cell’s9ability9to9absorb9oxygen9is9referred9to9as9respiration9while9its9communication9ability9involv
es9maintenance9of9a9steady9dynamic9state,9metabolic9absorption9provides9nutrition,9and9secretion9all
ows9for9the9synthesizing9of9new9substances.

,REF:9p.92



3. A9eukaryotic9cell9is9undergoing9DNA9replication.9In9which9region9of9the9cell9would9most9of9t
he9genetic9information9be9contained?

a. Mitochondria

b. Ribosome

c. Nucleolus

d. Nucleus9Cytoplas

m9ANS:9C

The9region9of9the9cell9that9contains9genetic9material,9including9a9large9amount9of9ribonucleic9acid,9mo
st9of9the9DNA,9and9DNA-binding9proteins,9is9the9nucleolus,9which9is9located9within9the9cell’s9nucleus.
Mitochondria9is9associated9with9cellular9respiration,9while9ribosomes9are9involved9with9protei
n9manufacturing.9Cytoplasm9is9a9fluid9filling9that9is9a9component9of9the9cell.



REF:9p.92




4. Which9of9the9following9can9remove9proteins9attached9to9the9cell’s9bilayer9by9dissolving9the9layer
itself?

a. Peripheral9membrane9proteins

b. Integral9membrane9proteins

c. Glycoproteins

d. Cell9adhesion9molecule

s9ANS:9B

Proteins9directly9attached9to9the9membrane9bilayer9can9be9removed9by9the9action9of9integral9membra
ne9proteins9that9dissolve9the9bilayer.9Peripheral9membrane9proteins9reside9at9the9surface9while9cell9ad
hesion9molecules9are9on9the9outside9of9the9membrane.9Glycoprotein9marks9cells9and9does9not9float.



REF:9p.97

, 5. Which9of9the9following9can9bind9to9plasma9membrane9receptors?

a. Oxygen

b. Ribosomes

c. Amphipathic9lipids

d. Ligands

ANS:9D
9


Ligands9are9the9only9specific9molecules9that9can9bind9with9receptors9on9the9cell9membrane.



REF:9p.99



6. A9nurse9is9reviewing9a9report9from9a9patient9with9metastatic9cancer.9What9alternation9in9t
he9extracellular9matrix9would9suNppoRrt9thIe9dGiagnBo.siCs9ofMmetastatic9cancer?

a. Decreased9fibronectin

b. Increased9collagen

c. Decreased9elastin

d. Increased9glycoprotein

s9ANS:9A

Only9a9reduced9amount9of9fibronectin9is9found9in9some9types9of9cancerous9cells,9allowing9them9to9tra
vel9or9metastasize.



REF:9p.910



7. Which9form9of9cell9communication9is9used9to9relate9to9other9cells9in9direct9physical9contact?

a. Cell9junction

b. Gap9junction

c. Desmosome

d. Tight9junctio

n9ANS:9A

Cell9junctions9hold9cells9together9and9permit9molecules9to9pass9from9cell9to9cell.