1) strontium-90 is a radioactive isotope which is particularly hazardous. which of the
following statements is true about an atom of strontium-90?
a.it contains 38 neutrons.
b.it contains 38 protons.
c.it contains 90 protons.
d.it contains 90 protons.
2) serum is obtained by removing which of the following from plasma?
a.albuminc.globulin
b.fibrinogend.hemoglobin
3) atoms of which of the following elements are largest?
a.ca
b.k
c.mg
d.na
4) which of the following molecules is best described as having a nearly tetrahedral
distribution of electron density?
a.becl2
b.of2
c.sncl2
d.none of these
5) what is the common name of cu+?
a.copper ion
b.cuprate ion
c.cupric ion
d.cuprous ion
6) which of the following is true of the individual resonance structures which contribute
to a resonance hybrid?
a.each resonance structure actually exists.
b.each resonance structure is less stable than is the resonance hybrid.
c.in going from one resonance structure to another the electrons move from one
location to another.
d.none of the above is true.
7) which of the following levels of psa in serum is the smallest which indicates the
development of prostate cancer?
a.12 pg/mlc.12 g/ml
b.12 ng/mld.12 mg/ml
8) the blood-brain barrier is permeable to which of the following species?
a.cl-
b.alcohol
c.na+
d.none of these
9) which of the following is the approximate pressure of oxygen in the muscles?
a.20 mm hgc.100 mm hg
b.40 mm hgd.160 mm hg
10) what is the correct formula for aluminum oxide?
a.alo
b.alo2
c.al2o
d.al2o3
11) which of the following contains only transition metals?
a.ca, cr, fe, ni,
b.v, w, xe, zr
c.cr, mo, ni, pt
d.none of these
12) what name is applied to the process of maintaining the body temperature and the
appropriate levels of nutrients?
a.equilibrationc.homeostasis
b.hemolysisd.osmosis
13) which of the following elements is named for a continent?
a.as
b.au
c.eu
d.all of them
14) which of the following contains two species which have the same mass number?
a.14c, 14n
b.12c, 13c
c.both a and b
d.neither a nor b
15) examine the following image representing the structure of a compound.
which of the following is most likely the type of bonding in this compound?
a.ionic
b.nonpolar covalent
c.polar covalent
d.electronegative
16) a student is attempting to draw several resonance structures for a species. which of
the following is allowed ?
a.change the number of paired and unpaired electrons.
b.move electrons from one location to another.
c.both a and b
d.neither a nor b
17) the following images shows some representations of some of the common
components of blood.
which type of cell is the most prevalent one found in the blood?
a.erythrocytes
b.thrombocytes
c.leukocytes
d.agranular leukocytes
e.all occur in about equal amounts.