PAX Science NLN Exam Q&A with
complete solution.
A person blows his breath into a straw that is placed in limewater. The
limewater becomes cloudy because the person's breath contains
A.) carbon dioxide.
B.) hydrogen.
C.) oxygen.
D.) nitrogen. ~CORRECT ANSWER~✓✓answer: carbon dioxide.
A physician measures the pulse and blood pressure (BP) of all patients
on a routine basis. Which of these measurements show the normal BP
values for a resting adult patient?
A.) 125/95 mm Hg
B.) 120/80 mm Hg
C.) 100/80 mm Hg
D.) 72/120 mm Hg ~CORRECT ANSWER~✓✓answer: 120/80 mm Hg
A woman suddenly chokes on a piece of food and clutches frantically at
her throat. An immediate remedy is to
,A.) have her bend forward and tell her to cough.
B.) insert a finger or a blunt object toward the back of the mouth.
C.) apply quick, hard pressures successively to her abdomen, just
beneath her diaphragm.
D.) phone "emergency" for help. ~CORRECT ANSWER~✓✓answer:
apply quick, hard pressures successively to her abdomen, just beneath
her diaphragm.
An unknown gas is more dense than air, does not support combustion,
and turns a limewater solution cloudy. This gas is most probably
A.) ammonia.
B.) methane.
C.) carbon dioxide.
C.) hydrogen. ~CORRECT ANSWER~✓✓answer: carbon dioxide.
Human testes produce
A.) eggs.
B.) follicle stimulating hormone.
C.) growth hormone.
D.) spermatozoa. ~CORRECT ANSWER~✓✓answer: spermatozoa.
,If a red light is passed through a dilute solution of chlorophyll solution,
the spectrophotometer will detect what amount of transmittance of this
light?
A.) 100%
B.) 50 - 75%
C.) Less than 25%
D.) None ~CORRECT ANSWER~✓✓answer: 50 - 75%
In diagnostic testing, the electroencephalogram permits the physician
to
A.) examine the impulses of the specialized muscle cells of the heart.
B.) examine the impulses of the nerve cells within the brain.
C.) measure the pressure within the eye.
D.) measure the amount of air upon exhalation. ~CORRECT
ANSWER~✓✓answer: examine the impulses of the nerve cells within
the brain.
To sterilize a metal probe in the office, a dentist could use a steam
sterilizer. If unavailable, the next most effective method to sterilize the
instrument would be
A.) boiling it in water for 15 minutes.
, B.) dipping it into a concentrated acid solution.
C.) heating it in a hot air oven at 160°C for 20 minutes.
D.) washing it in soap and water. ~CORRECT ANSWER~✓✓answer:
boiling it in water for 15 minutes.
In varieties of matter, the term heterogeneous may be applied to
A.) elements, but not compounds.
B.) compounds, but not elements.
C.) compounds and elements, but not mixtures.
D.) mixtures, but not elements or compounds. ~CORRECT
ANSWER~✓✓answer: mixtures, but not elements or compounds.
Heat energy is absorbed in which of these phase changes?
A.) Br2 (l) -> Br2(s)
B.) Br2 (g) --> Br2(l)
C.) Br2 (l) -> Br2(g)
D.) Br2 (g) -> Br2(s) ~CORRECT ANSWER~✓✓answer: Br2 (l) ->
Br2(g)
Periodontitis is an inflammatory condition of the
complete solution.
A person blows his breath into a straw that is placed in limewater. The
limewater becomes cloudy because the person's breath contains
A.) carbon dioxide.
B.) hydrogen.
C.) oxygen.
D.) nitrogen. ~CORRECT ANSWER~✓✓answer: carbon dioxide.
A physician measures the pulse and blood pressure (BP) of all patients
on a routine basis. Which of these measurements show the normal BP
values for a resting adult patient?
A.) 125/95 mm Hg
B.) 120/80 mm Hg
C.) 100/80 mm Hg
D.) 72/120 mm Hg ~CORRECT ANSWER~✓✓answer: 120/80 mm Hg
A woman suddenly chokes on a piece of food and clutches frantically at
her throat. An immediate remedy is to
,A.) have her bend forward and tell her to cough.
B.) insert a finger or a blunt object toward the back of the mouth.
C.) apply quick, hard pressures successively to her abdomen, just
beneath her diaphragm.
D.) phone "emergency" for help. ~CORRECT ANSWER~✓✓answer:
apply quick, hard pressures successively to her abdomen, just beneath
her diaphragm.
An unknown gas is more dense than air, does not support combustion,
and turns a limewater solution cloudy. This gas is most probably
A.) ammonia.
B.) methane.
C.) carbon dioxide.
C.) hydrogen. ~CORRECT ANSWER~✓✓answer: carbon dioxide.
Human testes produce
A.) eggs.
B.) follicle stimulating hormone.
C.) growth hormone.
D.) spermatozoa. ~CORRECT ANSWER~✓✓answer: spermatozoa.
,If a red light is passed through a dilute solution of chlorophyll solution,
the spectrophotometer will detect what amount of transmittance of this
light?
A.) 100%
B.) 50 - 75%
C.) Less than 25%
D.) None ~CORRECT ANSWER~✓✓answer: 50 - 75%
In diagnostic testing, the electroencephalogram permits the physician
to
A.) examine the impulses of the specialized muscle cells of the heart.
B.) examine the impulses of the nerve cells within the brain.
C.) measure the pressure within the eye.
D.) measure the amount of air upon exhalation. ~CORRECT
ANSWER~✓✓answer: examine the impulses of the nerve cells within
the brain.
To sterilize a metal probe in the office, a dentist could use a steam
sterilizer. If unavailable, the next most effective method to sterilize the
instrument would be
A.) boiling it in water for 15 minutes.
, B.) dipping it into a concentrated acid solution.
C.) heating it in a hot air oven at 160°C for 20 minutes.
D.) washing it in soap and water. ~CORRECT ANSWER~✓✓answer:
boiling it in water for 15 minutes.
In varieties of matter, the term heterogeneous may be applied to
A.) elements, but not compounds.
B.) compounds, but not elements.
C.) compounds and elements, but not mixtures.
D.) mixtures, but not elements or compounds. ~CORRECT
ANSWER~✓✓answer: mixtures, but not elements or compounds.
Heat energy is absorbed in which of these phase changes?
A.) Br2 (l) -> Br2(s)
B.) Br2 (g) --> Br2(l)
C.) Br2 (l) -> Br2(g)
D.) Br2 (g) -> Br2(s) ~CORRECT ANSWER~✓✓answer: Br2 (l) ->
Br2(g)
Periodontitis is an inflammatory condition of the
