1) which of the following correctly represents the electronic configuration of sulfur?
a.1s22s22p63s23p4
b.1s22s22p63s23px23py13pz1
c.[ne]3s23p4
d.all of them
2) consider the following reaction involved in carbon dioxide transport in the blood.
what happens to this reaction when the partial pressure of carbon dioxide decreases?
a.shifts to the right
b.shifts to the left
c.unaffected by muscle contraction
3) which of the following statements describe a compound?
a.a compound is a pure substance.
b.a compound obeys the law of constant composition.
c.both a and b
d.neither a nor b
4) what is the name of the species formed when a sodium atom loses an electron?
a.sodate
b.sodide
c.sodium
d.sodium ion
5) the secretion of renin by the kidneys results in which of the following?
a.the conversion of angiotensinogen to angiotensin
b.an increase in blood pressure
c.both a and b
d.neither a nor b
6) where are baroreceptors located?
a.in the brainc.in the lungs
b.in the heartd.in the neck
7) how many unpaired electrons are there in a fluorine atom in its ground state?
a.1
b.3
c.5
d.7
8) which of the following molecules is(are) polar?
a.bcl3
b.nh3
c.both of them
d.neither of them
9) what is the formula of the compound formed between the ammonium ion and the
carbonate ion?
a.nh4co3
b.nh4(co3)2
c.(nh4)2co3
d.(nh4)3co3
10) which of the following results from the fact that the osmotic pressure of blood is
lower than the pressure at the arterial capillaries?
a.nutrients flow from the capillaries into the interstitial fluid.
b.wastes flow from the interstitial fluid into the capillaries.
c.both a and b
d.neither a nor b
11) which of the following statements is generally true about electronegativity?
a.electronegativity decreases as we move left to right and decreases as we move top to
bottom.
b.electronegativity decreases as we move left to right and increases as we move top to
bottom.
c.electronegativity increases as we move left to right and decreases as we move top to
bottom.
d.electronegativity increases as we move left to right and increases as we move top to
bottom.
12) in addition to the lymph nodes, where are lymphocytes formed?
a.the bone marrowc.the kidneys
b.the pancreasd.the spleen
13) which of the following statements about nitric oxide, no, is false?
a.no contains an unpaired electron.
b.no decreases the ability of the blood to carry oxygen.
c.no is an important signaling molecule in the cardiovascular system.
d.none, all of the above are true.
14) which of the following sets of numbers could be used to designate the principal
energy levels (shells) in an atom?
a.-1, 0, 1, 2, 3
b.0, 1, 2, 3, 4
c.1, 2, 3, 4, 5
d.all of these
15) the name of which greek philosopher is most closely associated with the concept of
an atom?
a.aristotle
b.democritus
c.plato
d.zeno
16) which of the following compounds is used as a radiopaque medium for x-ray work?
a.baso4
b.caso4
c.feso4
d.mgso4
17) what is the common name of cu2+?
a.copper ion
b.cuprate ion
c.cupric ion
d.cuprous ion
18) aluminum and fluorine form a compound in which the aluminum to fluorine ratio is
1:3. what is the correct formula for this compound?
a.af3
b.alfl3
c.alf3
d.al(f2)3
19) when a strong magnet is brought near to a sample which is known to contain both
iron and sulfur the iron and the sulfur are separated from one another. what type of
material is this sample?
a.a compound
b.a homogeneous mixture
c.a heterogeneous mixture
d.there is insufficient information to answer.